/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/chl/name-comparator-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 15:48:54,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 15:48:54,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 15:48:54,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 15:48:54,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 15:48:54,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 15:48:54,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 15:48:54,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 15:48:54,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 15:48:54,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 15:48:54,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 15:48:54,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 15:48:54,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 15:48:54,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 15:48:54,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 15:48:54,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 15:48:54,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 15:48:54,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 15:48:54,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 15:48:54,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 15:48:54,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 15:48:54,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 15:48:54,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 15:48:54,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 15:48:54,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-15 15:48:54,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-15 15:48:54,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-15 15:48:54,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-15 15:48:54,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-15 15:48:54,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-15 15:48:54,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-15 15:48:54,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-15 15:48:54,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-15 15:48:54,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-15 15:48:54,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-15 15:48:54,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-15 15:48:54,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-15 15:48:54,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-15 15:48:54,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 15:48:54,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 15:48:54,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 15:48:54,432 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 [2022-03-15 15:48:54,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 15:48:54,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 15:48:54,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 15:48:54,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 15:48:54,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 15:48:54,459 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 15:48:54,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 15:48:54,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 15:48:54,460 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 15:48:54,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 15:48:54,460 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 15:48:54,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 15:48:54,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 15:48:54,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 15:48:54,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 15:48:54,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 15:48:54,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 15:48:54,461 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 15:48:54,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 15:48:54,461 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 15:48:54,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 15:48:54,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 15:48:54,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 15:48:54,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 15:48:54,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 15:48:54,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:48:54,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 15:48:54,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 15:48:54,462 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 15:48:54,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 15:48:54,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 15:48:54,462 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 15:48:54,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 15:48:54,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 15:48:54,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 15:48:54,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 15:48:54,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 15:48:54,674 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 15:48:54,675 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 15:48:54,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-symm.wvr.bpl [2022-03-15 15:48:54,677 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-symm.wvr.bpl' [2022-03-15 15:48:54,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 15:48:54,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 15:48:54,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 15:48:54,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 15:48:54,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 15:48:54,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:48:54" (1/1) ... [2022-03-15 15:48:54,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:48:54" (1/1) ... [2022-03-15 15:48:54,736 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 15:48:54,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 15:48:54,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 15:48:54,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 15:48:54,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 15:48:54,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:48:54" (1/1) ... [2022-03-15 15:48:54,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:48:54" (1/1) ... [2022-03-15 15:48:54,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:48:54" (1/1) ... [2022-03-15 15:48:54,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:48:54" (1/1) ... [2022-03-15 15:48:54,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:48:54" (1/1) ... [2022-03-15 15:48:54,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:48:54" (1/1) ... [2022-03-15 15:48:54,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:48:54" (1/1) ... [2022-03-15 15:48:54,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 15:48:54,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 15:48:54,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 15:48:54,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 15:48:54,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:48:54" (1/1) ... [2022-03-15 15:48:54,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:48:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:54,809 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) [2022-03-15 15:48:54,825 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 [2022-03-15 15:48:54,846 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 15:48:54,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 15:48:54,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 15:48:54,847 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 15:48:54,847 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 15:48:54,847 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 15:48:54,847 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 15:48:54,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 15:48:54,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 15:48:54,848 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 15:48:54,883 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 15:48:54,885 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 15:48:55,040 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 15:48:55,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 15:48:55,107 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-15 15:48:55,113 INFO L202 PluginConnector]: Adding new model name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:48:55 BoogieIcfgContainer [2022-03-15 15:48:55,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 15:48:55,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 15:48:55,124 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 15:48:55,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 15:48:55,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:48:54" (1/2) ... [2022-03-15 15:48:55,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d9c4ed0 and model type name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 03:48:55, skipping insertion in model container [2022-03-15 15:48:55,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:48:55" (2/2) ... [2022-03-15 15:48:55,128 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-symm.wvr.bpl [2022-03-15 15:48:55,131 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 15:48:55,131 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 15:48:55,131 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 15:48:55,132 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 15:48:55,179 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 15:48:55,204 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 15:48:55,211 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 15:48:55,211 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 15:48:55,218 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2022-03-15 15:48:55,231 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:55,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:55,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 15:48:55,240 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:55,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:55,240 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:55,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:55,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1589751449, now seen corresponding path program 1 times [2022-03-15 15:48:55,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:55,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526924966] [2022-03-15 15:48:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:55,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:55,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:55,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526924966] [2022-03-15 15:48:55,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526924966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:55,487 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:55,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 15:48:55,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660732376] [2022-03-15 15:48:55,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:55,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 15:48:55,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:55,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 15:48:55,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:48:55,527 INFO L87 Difference]: Start difference. First operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:55,676 INFO L93 Difference]: Finished difference Result 60 states and 109 transitions. [2022-03-15 15:48:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 15:48:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:55,686 INFO L225 Difference]: With dead ends: 60 [2022-03-15 15:48:55,687 INFO L226 Difference]: Without dead ends: 53 [2022-03-15 15:48:55,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:48:55,692 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:55,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 23 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:48:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-15 15:48:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2022-03-15 15:48:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2022-03-15 15:48:55,721 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 12 [2022-03-15 15:48:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:55,722 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2022-03-15 15:48:55,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2022-03-15 15:48:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 15:48:55,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:55,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:55,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 15:48:55,726 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:55,727 INFO L85 PathProgramCache]: Analyzing trace with hash 976391385, now seen corresponding path program 2 times [2022-03-15 15:48:55,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:55,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295470812] [2022-03-15 15:48:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:55,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:55,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:55,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295470812] [2022-03-15 15:48:55,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295470812] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:55,866 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:55,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 15:48:55,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808238793] [2022-03-15 15:48:55,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:55,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 15:48:55,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:55,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 15:48:55,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:48:55,868 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:55,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:55,969 INFO L93 Difference]: Finished difference Result 66 states and 123 transitions. [2022-03-15 15:48:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:55,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 15:48:55,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:55,972 INFO L225 Difference]: With dead ends: 66 [2022-03-15 15:48:55,972 INFO L226 Difference]: Without dead ends: 59 [2022-03-15 15:48:55,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:48:55,977 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:55,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 19 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-15 15:48:55,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2022-03-15 15:48:55,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 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) [2022-03-15 15:48:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2022-03-15 15:48:55,991 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 12 [2022-03-15 15:48:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:55,991 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2022-03-15 15:48:55,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2022-03-15 15:48:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 15:48:55,992 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:55,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:55,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 15:48:55,993 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1594726585, now seen corresponding path program 3 times [2022-03-15 15:48:55,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:55,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652760568] [2022-03-15 15:48:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:55,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:56,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652760568] [2022-03-15 15:48:56,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652760568] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:56,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:56,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 15:48:56,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306854042] [2022-03-15 15:48:56,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:56,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 15:48:56,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:56,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 15:48:56,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:48:56,131 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:56,236 INFO L93 Difference]: Finished difference Result 83 states and 151 transitions. [2022-03-15 15:48:56,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:56,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 15:48:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:56,237 INFO L225 Difference]: With dead ends: 83 [2022-03-15 15:48:56,237 INFO L226 Difference]: Without dead ends: 76 [2022-03-15 15:48:56,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:48:56,238 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:56,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 21 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-15 15:48:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 43. [2022-03-15 15:48:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2022-03-15 15:48:56,242 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2022-03-15 15:48:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:56,242 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2022-03-15 15:48:56,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2022-03-15 15:48:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 15:48:56,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:56,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:56,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 15:48:56,243 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:56,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:56,244 INFO L85 PathProgramCache]: Analyzing trace with hash -750718205, now seen corresponding path program 4 times [2022-03-15 15:48:56,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:56,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497779254] [2022-03-15 15:48:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:56,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:56,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497779254] [2022-03-15 15:48:56,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497779254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:56,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:56,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 15:48:56,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571581746] [2022-03-15 15:48:56,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:56,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 15:48:56,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:56,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 15:48:56,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:48:56,322 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:56,409 INFO L93 Difference]: Finished difference Result 83 states and 146 transitions. [2022-03-15 15:48:56,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:56,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 15:48:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:56,410 INFO L225 Difference]: With dead ends: 83 [2022-03-15 15:48:56,410 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 15:48:56,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:48:56,411 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:56,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:56,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 15:48:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2022-03-15 15:48:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2022-03-15 15:48:56,415 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 12 [2022-03-15 15:48:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:56,415 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2022-03-15 15:48:56,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2022-03-15 15:48:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 15:48:56,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:56,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:56,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 15:48:56,416 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1322173011, now seen corresponding path program 5 times [2022-03-15 15:48:56,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:56,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539155363] [2022-03-15 15:48:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:56,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:56,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539155363] [2022-03-15 15:48:56,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539155363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:56,475 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:56,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 15:48:56,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820646235] [2022-03-15 15:48:56,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:56,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 15:48:56,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:56,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 15:48:56,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:48:56,477 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:56,535 INFO L93 Difference]: Finished difference Result 69 states and 125 transitions. [2022-03-15 15:48:56,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:56,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 15:48:56,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:56,535 INFO L225 Difference]: With dead ends: 69 [2022-03-15 15:48:56,536 INFO L226 Difference]: Without dead ends: 58 [2022-03-15 15:48:56,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-15 15:48:56,536 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:56,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 21 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:56,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-15 15:48:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2022-03-15 15:48:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2022-03-15 15:48:56,539 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 12 [2022-03-15 15:48:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:56,539 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2022-03-15 15:48:56,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2022-03-15 15:48:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:48:56,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:56,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:56,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 15:48:56,540 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:56,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:56,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1431687767, now seen corresponding path program 1 times [2022-03-15 15:48:56,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:56,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421650975] [2022-03-15 15:48:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:56,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421650975] [2022-03-15 15:48:56,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421650975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:56,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:56,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:48:56,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872647846] [2022-03-15 15:48:56,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:56,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:48:56,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:56,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:48:56,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:48:56,578 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:56,604 INFO L93 Difference]: Finished difference Result 65 states and 120 transitions. [2022-03-15 15:48:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:56,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:48:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:56,606 INFO L225 Difference]: With dead ends: 65 [2022-03-15 15:48:56,606 INFO L226 Difference]: Without dead ends: 57 [2022-03-15 15:48:56,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:48:56,607 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:56,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 20 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-15 15:48:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2022-03-15 15:48:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2022-03-15 15:48:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 73 transitions. [2022-03-15 15:48:56,609 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 73 transitions. Word has length 13 [2022-03-15 15:48:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:56,610 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 73 transitions. [2022-03-15 15:48:56,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,610 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 73 transitions. [2022-03-15 15:48:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:48:56,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:56,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:56,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 15:48:56,610 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash 573852091, now seen corresponding path program 1 times [2022-03-15 15:48:56,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:56,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242934682] [2022-03-15 15:48:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:56,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:56,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242934682] [2022-03-15 15:48:56,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242934682] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:56,638 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:56,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:48:56,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016828733] [2022-03-15 15:48:56,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:56,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:48:56,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:56,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:48:56,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:48:56,639 INFO L87 Difference]: Start difference. First operand 38 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:56,669 INFO L93 Difference]: Finished difference Result 61 states and 116 transitions. [2022-03-15 15:48:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:48:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:56,670 INFO L225 Difference]: With dead ends: 61 [2022-03-15 15:48:56,670 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 15:48:56,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:48:56,671 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:56,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 20 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 15:48:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2022-03-15 15:48:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2022-03-15 15:48:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 73 transitions. [2022-03-15 15:48:56,673 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 73 transitions. Word has length 13 [2022-03-15 15:48:56,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:56,673 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 73 transitions. [2022-03-15 15:48:56,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 73 transitions. [2022-03-15 15:48:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:48:56,674 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:56,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:56,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-15 15:48:56,674 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:56,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:56,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1028986729, now seen corresponding path program 2 times [2022-03-15 15:48:56,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:56,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551026272] [2022-03-15 15:48:56,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:56,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:56,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551026272] [2022-03-15 15:48:56,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551026272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:56,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:56,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:48:56,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418717098] [2022-03-15 15:48:56,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:56,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:48:56,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:56,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:48:56,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:48:56,707 INFO L87 Difference]: Start difference. First operand 38 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:56,751 INFO L93 Difference]: Finished difference Result 75 states and 134 transitions. [2022-03-15 15:48:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:56,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:48:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:56,751 INFO L225 Difference]: With dead ends: 75 [2022-03-15 15:48:56,751 INFO L226 Difference]: Without dead ends: 72 [2022-03-15 15:48:56,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:48:56,752 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:56,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:56,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-15 15:48:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2022-03-15 15:48:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2022-03-15 15:48:56,755 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 13 [2022-03-15 15:48:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:56,755 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2022-03-15 15:48:56,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2022-03-15 15:48:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:48:56,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:56,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:56,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-15 15:48:56,756 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:56,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:56,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1663335145, now seen corresponding path program 2 times [2022-03-15 15:48:56,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:56,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906359766] [2022-03-15 15:48:56,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:56,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:56,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906359766] [2022-03-15 15:48:56,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906359766] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:56,790 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:56,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:48:56,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345488537] [2022-03-15 15:48:56,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:56,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:48:56,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:48:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:48:56,792 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:56,829 INFO L93 Difference]: Finished difference Result 65 states and 120 transitions. [2022-03-15 15:48:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:56,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:48:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:56,829 INFO L225 Difference]: With dead ends: 65 [2022-03-15 15:48:56,829 INFO L226 Difference]: Without dead ends: 65 [2022-03-15 15:48:56,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:48:56,830 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:56,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:56,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-15 15:48:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2022-03-15 15:48:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2022-03-15 15:48:56,833 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 13 [2022-03-15 15:48:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:56,833 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2022-03-15 15:48:56,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2022-03-15 15:48:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:48:56,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:56,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:56,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-15 15:48:56,834 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:56,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:56,834 INFO L85 PathProgramCache]: Analyzing trace with hash 446483723, now seen corresponding path program 3 times [2022-03-15 15:48:56,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:56,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329254758] [2022-03-15 15:48:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:56,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:56,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329254758] [2022-03-15 15:48:56,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329254758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:56,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:56,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:48:56,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150096660] [2022-03-15 15:48:56,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:56,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:48:56,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:48:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:48:56,861 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:56,888 INFO L93 Difference]: Finished difference Result 46 states and 87 transitions. [2022-03-15 15:48:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:56,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:48:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:56,888 INFO L225 Difference]: With dead ends: 46 [2022-03-15 15:48:56,888 INFO L226 Difference]: Without dead ends: 44 [2022-03-15 15:48:56,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:48:56,889 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:56,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:56,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-15 15:48:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-03-15 15:48:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 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) [2022-03-15 15:48:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2022-03-15 15:48:56,892 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 13 [2022-03-15 15:48:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:56,892 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2022-03-15 15:48:56,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2022-03-15 15:48:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:48:56,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:56,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:56,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-15 15:48:56,892 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1271515411, now seen corresponding path program 3 times [2022-03-15 15:48:56,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:56,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704823918] [2022-03-15 15:48:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:56,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:56,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704823918] [2022-03-15 15:48:56,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704823918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:56,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:56,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:48:56,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023929134] [2022-03-15 15:48:56,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:56,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:48:56,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:48:56,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:48:56,924 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:56,956 INFO L93 Difference]: Finished difference Result 58 states and 109 transitions. [2022-03-15 15:48:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:56,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:48:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:56,957 INFO L225 Difference]: With dead ends: 58 [2022-03-15 15:48:56,957 INFO L226 Difference]: Without dead ends: 58 [2022-03-15 15:48:56,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:48:56,957 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:56,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 16 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:56,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-15 15:48:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2022-03-15 15:48:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 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) [2022-03-15 15:48:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-03-15 15:48:56,959 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2022-03-15 15:48:56,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:56,959 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-03-15 15:48:56,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-03-15 15:48:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:48:56,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:56,960 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:56,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-15 15:48:56,960 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:56,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1366259013, now seen corresponding path program 4 times [2022-03-15 15:48:56,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:56,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272963941] [2022-03-15 15:48:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:56,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:56,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272963941] [2022-03-15 15:48:56,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272963941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:56,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:56,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:48:56,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893850671] [2022-03-15 15:48:56,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:56,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:48:56,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:56,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:48:56,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:48:56,992 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:57,035 INFO L93 Difference]: Finished difference Result 43 states and 79 transitions. [2022-03-15 15:48:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:57,035 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:48:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:57,035 INFO L225 Difference]: With dead ends: 43 [2022-03-15 15:48:57,035 INFO L226 Difference]: Without dead ends: 40 [2022-03-15 15:48:57,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:48:57,036 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:57,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-15 15:48:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-15 15:48:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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) [2022-03-15 15:48:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2022-03-15 15:48:57,038 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 13 [2022-03-15 15:48:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:57,038 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2022-03-15 15:48:57,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2022-03-15 15:48:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:48:57,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:57,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:57,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-15 15:48:57,039 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:57,039 INFO L85 PathProgramCache]: Analyzing trace with hash 628206143, now seen corresponding path program 5 times [2022-03-15 15:48:57,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:57,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920949000] [2022-03-15 15:48:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:57,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:57,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:57,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920949000] [2022-03-15 15:48:57,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920949000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:57,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:57,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:48:57,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074945791] [2022-03-15 15:48:57,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:57,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:48:57,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:57,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:48:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:48:57,073 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:57,111 INFO L93 Difference]: Finished difference Result 43 states and 82 transitions. [2022-03-15 15:48:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:57,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:48:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:57,111 INFO L225 Difference]: With dead ends: 43 [2022-03-15 15:48:57,111 INFO L226 Difference]: Without dead ends: 43 [2022-03-15 15:48:57,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:48:57,112 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:57,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-15 15:48:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2022-03-15 15:48:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 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) [2022-03-15 15:48:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-03-15 15:48:57,114 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2022-03-15 15:48:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:57,114 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-03-15 15:48:57,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-03-15 15:48:57,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:48:57,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:57,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:57,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-15 15:48:57,115 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:57,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1703917299, now seen corresponding path program 6 times [2022-03-15 15:48:57,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:57,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005686933] [2022-03-15 15:48:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:57,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:57,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:57,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005686933] [2022-03-15 15:48:57,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005686933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:48:57,141 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:48:57,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 15:48:57,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252562200] [2022-03-15 15:48:57,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:48:57,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 15:48:57,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:57,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 15:48:57,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-15 15:48:57,142 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:57,174 INFO L93 Difference]: Finished difference Result 42 states and 80 transitions. [2022-03-15 15:48:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 15:48:57,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:48:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:57,175 INFO L225 Difference]: With dead ends: 42 [2022-03-15 15:48:57,175 INFO L226 Difference]: Without dead ends: 42 [2022-03-15 15:48:57,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-15 15:48:57,175 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:57,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 21 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:48:57,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-15 15:48:57,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-03-15 15:48:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 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) [2022-03-15 15:48:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-03-15 15:48:57,177 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2022-03-15 15:48:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:57,177 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-03-15 15:48:57,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-03-15 15:48:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:48:57,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:57,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:57,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-15 15:48:57,178 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:57,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:57,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1435170503, now seen corresponding path program 1 times [2022-03-15 15:48:57,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:57,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513572312] [2022-03-15 15:48:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:57,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:57,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:57,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513572312] [2022-03-15 15:48:57,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513572312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:57,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975283722] [2022-03-15 15:48:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:57,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:57,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:57,324 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) [2022-03-15 15:48:57,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 15:48:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:57,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:48:57,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:57,594 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 147 treesize of output 117 [2022-03-15 15:48:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:57,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:48:58,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:48:58,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 117 [2022-03-15 15:48:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:58,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975283722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:48:58,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:48:58,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:48:58,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870799423] [2022-03-15 15:48:58,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:48:58,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:48:58,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:48:58,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:48:58,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:48:58,686 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:59,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:48:59,049 INFO L93 Difference]: Finished difference Result 83 states and 159 transitions. [2022-03-15 15:48:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:48:59,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:48:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:48:59,050 INFO L225 Difference]: With dead ends: 83 [2022-03-15 15:48:59,050 INFO L226 Difference]: Without dead ends: 76 [2022-03-15 15:48:59,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:48:59,051 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 57 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:48:59,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 55 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:48:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-15 15:48:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 51. [2022-03-15 15:48:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2022-03-15 15:48:59,053 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2022-03-15 15:48:59,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:48:59,053 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2022-03-15 15:48:59,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:48:59,053 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2022-03-15 15:48:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:48:59,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:48:59,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:48:59,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 15:48:59,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 15:48:59,263 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:48:59,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:48:59,264 INFO L85 PathProgramCache]: Analyzing trace with hash 849406809, now seen corresponding path program 2 times [2022-03-15 15:48:59,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:48:59,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762706115] [2022-03-15 15:48:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:48:59,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:48:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:48:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:59,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:48:59,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762706115] [2022-03-15 15:48:59,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762706115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:48:59,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997648036] [2022-03-15 15:48:59,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:48:59,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:48:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:48:59,431 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) [2022-03-15 15:48:59,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 15:48:59,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:48:59,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:48:59,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:48:59,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:48:59,664 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 154 treesize of output 122 [2022-03-15 15:48:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:48:59,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:00,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:00,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 188 [2022-03-15 15:49:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:00,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997648036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:00,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:00,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:49:00,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887628970] [2022-03-15 15:49:00,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:00,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:00,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:00,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:00,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:00,916 INFO L87 Difference]: Start difference. First operand 51 states and 100 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:01,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:01,171 INFO L93 Difference]: Finished difference Result 84 states and 159 transitions. [2022-03-15 15:49:01,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:49:01,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:49:01,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:01,172 INFO L225 Difference]: With dead ends: 84 [2022-03-15 15:49:01,172 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:49:01,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:49:01,173 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:01,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 64 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:01,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:49:01,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2022-03-15 15:49:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2022-03-15 15:49:01,175 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2022-03-15 15:49:01,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:01,175 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2022-03-15 15:49:01,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2022-03-15 15:49:01,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:49:01,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:01,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:01,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:01,376 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,SelfDestructingSolverStorable15 [2022-03-15 15:49:01,376 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:01,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1451095331, now seen corresponding path program 3 times [2022-03-15 15:49:01,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:01,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713237013] [2022-03-15 15:49:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:01,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:01,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:01,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713237013] [2022-03-15 15:49:01,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713237013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:01,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898805874] [2022-03-15 15:49:01,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:01,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:01,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:01,502 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) [2022-03-15 15:49:01,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 15:49:01,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:49:01,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:01,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:49:01,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:01,684 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 154 treesize of output 122 [2022-03-15 15:49:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:01,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:02,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:02,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 166 [2022-03-15 15:49:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:02,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898805874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:02,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:02,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:49:02,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180180058] [2022-03-15 15:49:02,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:02,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:02,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:02,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:02,906 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:03,258 INFO L93 Difference]: Finished difference Result 86 states and 161 transitions. [2022-03-15 15:49:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:49:03,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:49:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:03,259 INFO L225 Difference]: With dead ends: 86 [2022-03-15 15:49:03,259 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 15:49:03,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:49:03,260 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:03,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 104 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 15:49:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2022-03-15 15:49:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:03,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 102 transitions. [2022-03-15 15:49:03,263 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 102 transitions. Word has length 14 [2022-03-15 15:49:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:03,263 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 102 transitions. [2022-03-15 15:49:03,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 102 transitions. [2022-03-15 15:49:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:49:03,263 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:03,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:03,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:03,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:03,475 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:03,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:03,476 INFO L85 PathProgramCache]: Analyzing trace with hash 697701205, now seen corresponding path program 4 times [2022-03-15 15:49:03,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:03,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4821643] [2022-03-15 15:49:03,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:03,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:03,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:03,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4821643] [2022-03-15 15:49:03,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4821643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:03,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179378632] [2022-03-15 15:49:03,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:03,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:03,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:03,614 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) [2022-03-15 15:49:03,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 15:49:03,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:03,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:03,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:49:03,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:03,828 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 157 treesize of output 123 [2022-03-15 15:49:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:04,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:05,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:05,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 176 [2022-03-15 15:49:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:05,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179378632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:05,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:05,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-15 15:49:05,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091800359] [2022-03-15 15:49:05,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:05,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:49:05,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:05,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:49:05,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:49:05,252 INFO L87 Difference]: Start difference. First operand 52 states and 102 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:06,027 INFO L93 Difference]: Finished difference Result 143 states and 256 transitions. [2022-03-15 15:49:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:49:06,028 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:49:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:06,028 INFO L225 Difference]: With dead ends: 143 [2022-03-15 15:49:06,028 INFO L226 Difference]: Without dead ends: 110 [2022-03-15 15:49:06,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:49:06,029 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:06,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 112 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-15 15:49:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 59. [2022-03-15 15:49:06,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.086206896551724) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 121 transitions. [2022-03-15 15:49:06,031 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 121 transitions. Word has length 14 [2022-03-15 15:49:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:06,031 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 121 transitions. [2022-03-15 15:49:06,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 121 transitions. [2022-03-15 15:49:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:49:06,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:06,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:06,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:06,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 15:49:06,239 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:06,240 INFO L85 PathProgramCache]: Analyzing trace with hash -388767161, now seen corresponding path program 5 times [2022-03-15 15:49:06,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:06,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369428976] [2022-03-15 15:49:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:06,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:06,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:06,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369428976] [2022-03-15 15:49:06,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369428976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:06,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450785082] [2022-03-15 15:49:06,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:06,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:06,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:06,395 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) [2022-03-15 15:49:06,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 15:49:06,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:06,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:06,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:49:06,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:06,699 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 132 treesize of output 104 [2022-03-15 15:49:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:06,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:07,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:07,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 207 [2022-03-15 15:49:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:07,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450785082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:07,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:07,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:49:07,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835226146] [2022-03-15 15:49:07,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:07,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:07,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:07,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:07,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:07,696 INFO L87 Difference]: Start difference. First operand 59 states and 121 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:08,234 INFO L93 Difference]: Finished difference Result 93 states and 180 transitions. [2022-03-15 15:49:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:49:08,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:49:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:08,235 INFO L225 Difference]: With dead ends: 93 [2022-03-15 15:49:08,235 INFO L226 Difference]: Without dead ends: 73 [2022-03-15 15:49:08,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:49:08,235 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:08,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 75 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-15 15:49:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2022-03-15 15:49:08,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 126 transitions. [2022-03-15 15:49:08,238 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 126 transitions. Word has length 14 [2022-03-15 15:49:08,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:08,239 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 126 transitions. [2022-03-15 15:49:08,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:08,239 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 126 transitions. [2022-03-15 15:49:08,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:49:08,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:08,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:08,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:08,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:08,440 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:08,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1605697995, now seen corresponding path program 6 times [2022-03-15 15:49:08,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:08,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693794675] [2022-03-15 15:49:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:08,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:08,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:08,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693794675] [2022-03-15 15:49:08,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693794675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:08,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753682595] [2022-03-15 15:49:08,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:08,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:08,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:08,601 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) [2022-03-15 15:49:08,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 15:49:08,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:49:08,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:08,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:49:08,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:08,781 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 128 treesize of output 102 [2022-03-15 15:49:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:09,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:09,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:09,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 166 [2022-03-15 15:49:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:10,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753682595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:10,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:10,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 15:49:10,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523412079] [2022-03-15 15:49:10,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:10,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:49:10,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:10,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:49:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:10,078 INFO L87 Difference]: Start difference. First operand 61 states and 126 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:10,838 INFO L93 Difference]: Finished difference Result 135 states and 254 transitions. [2022-03-15 15:49:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:49:10,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:49:10,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:10,840 INFO L225 Difference]: With dead ends: 135 [2022-03-15 15:49:10,840 INFO L226 Difference]: Without dead ends: 114 [2022-03-15 15:49:10,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:49:10,841 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:10,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 111 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:10,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-15 15:49:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 62. [2022-03-15 15:49:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2022-03-15 15:49:10,843 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 14 [2022-03-15 15:49:10,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:10,843 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2022-03-15 15:49:10,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:10,843 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2022-03-15 15:49:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:49:10,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:10,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:10,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:11,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:11,057 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash -540472765, now seen corresponding path program 7 times [2022-03-15 15:49:11,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:11,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104882262] [2022-03-15 15:49:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:11,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:11,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:11,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104882262] [2022-03-15 15:49:11,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104882262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:11,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314819807] [2022-03-15 15:49:11,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:11,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:11,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:11,196 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) [2022-03-15 15:49:11,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 15:49:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:11,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 15:49:11,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:11,480 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 148 treesize of output 118 [2022-03-15 15:49:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:11,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:12,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:12,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 209 [2022-03-15 15:49:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:12,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314819807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:12,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:12,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:49:12,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660338893] [2022-03-15 15:49:12,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:12,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:12,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:12,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:12,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:12,737 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:13,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:13,327 INFO L93 Difference]: Finished difference Result 132 states and 247 transitions. [2022-03-15 15:49:13,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:49:13,327 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:49:13,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:13,328 INFO L225 Difference]: With dead ends: 132 [2022-03-15 15:49:13,328 INFO L226 Difference]: Without dead ends: 106 [2022-03-15 15:49:13,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:49:13,328 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 104 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:13,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 111 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-15 15:49:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2022-03-15 15:49:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 135 transitions. [2022-03-15 15:49:13,330 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 135 transitions. Word has length 14 [2022-03-15 15:49:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:13,331 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 135 transitions. [2022-03-15 15:49:13,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 135 transitions. [2022-03-15 15:49:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 15:49:13,331 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:13,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:13,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:13,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:13,532 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1553165297, now seen corresponding path program 8 times [2022-03-15 15:49:13,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:13,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137073934] [2022-03-15 15:49:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:13,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:13,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:13,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137073934] [2022-03-15 15:49:13,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137073934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:13,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374628394] [2022-03-15 15:49:13,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:13,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:13,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:13,698 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) [2022-03-15 15:49:13,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 15:49:13,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:13,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:49:13,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:13,889 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 152 treesize of output 120 [2022-03-15 15:49:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:14,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:14,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:14,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 112 [2022-03-15 15:49:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:14,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374628394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:14,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:14,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-15 15:49:14,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925086809] [2022-03-15 15:49:14,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:14,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:49:14,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:14,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:49:14,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:49:14,945 INFO L87 Difference]: Start difference. First operand 64 states and 135 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:16,266 INFO L93 Difference]: Finished difference Result 148 states and 278 transitions. [2022-03-15 15:49:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:49:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 15:49:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:16,267 INFO L225 Difference]: With dead ends: 148 [2022-03-15 15:49:16,267 INFO L226 Difference]: Without dead ends: 120 [2022-03-15 15:49:16,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:49:16,268 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 140 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:16,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 145 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:49:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-15 15:49:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 70. [2022-03-15 15:49:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.2028985507246377) internal successors, (152), 69 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 152 transitions. [2022-03-15 15:49:16,270 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 152 transitions. Word has length 14 [2022-03-15 15:49:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:16,270 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 152 transitions. [2022-03-15 15:49:16,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 152 transitions. [2022-03-15 15:49:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:16,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:16,271 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:16,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:16,479 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,SelfDestructingSolverStorable21 [2022-03-15 15:49:16,479 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1928729797, now seen corresponding path program 9 times [2022-03-15 15:49:16,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:16,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211926752] [2022-03-15 15:49:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:16,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:16,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:16,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211926752] [2022-03-15 15:49:16,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211926752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:16,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502907265] [2022-03-15 15:49:16,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:16,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:16,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:16,537 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) [2022-03-15 15:49:16,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 15:49:16,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:49:16,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:16,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:16,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:16,651 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 54 treesize of output 42 [2022-03-15 15:49:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:16,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:16,712 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:16,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:49:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:16,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502907265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:16,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:16,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 15:49:16,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801530155] [2022-03-15 15:49:16,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:16,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 15:49:16,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:16,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 15:49:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:49:16,728 INFO L87 Difference]: Start difference. First operand 70 states and 152 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-15 15:49:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:16,834 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2022-03-15 15:49:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:16,834 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 15 [2022-03-15 15:49:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:16,835 INFO L225 Difference]: With dead ends: 105 [2022-03-15 15:49:16,835 INFO L226 Difference]: Without dead ends: 94 [2022-03-15 15:49:16,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:16,836 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:16,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 52 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:16,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-15 15:49:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2022-03-15 15:49:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.21875) internal successors, (142), 64 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 142 transitions. [2022-03-15 15:49:16,839 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 142 transitions. Word has length 15 [2022-03-15 15:49:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:16,839 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 142 transitions. [2022-03-15 15:49:16,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-15 15:49:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 142 transitions. [2022-03-15 15:49:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:16,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:16,839 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:16,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:17,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:17,056 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash 113463657, now seen corresponding path program 10 times [2022-03-15 15:49:17,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:17,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583612604] [2022-03-15 15:49:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:17,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:17,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:17,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583612604] [2022-03-15 15:49:17,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583612604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:17,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194956304] [2022-03-15 15:49:17,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:17,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:17,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:17,112 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) [2022-03-15 15:49:17,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 15:49:17,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:17,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:17,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:17,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:17,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:17,275 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:17,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-15 15:49:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:17,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194956304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:17,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:17,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-15 15:49:17,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216497242] [2022-03-15 15:49:17,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:17,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 15:49:17,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:17,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 15:49:17,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:49:17,279 INFO L87 Difference]: Start difference. First operand 65 states and 142 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:17,331 INFO L93 Difference]: Finished difference Result 102 states and 212 transitions. [2022-03-15 15:49:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:17,331 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:17,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:17,331 INFO L225 Difference]: With dead ends: 102 [2022-03-15 15:49:17,331 INFO L226 Difference]: Without dead ends: 102 [2022-03-15 15:49:17,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:49:17,332 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:17,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 57 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:49:17,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-15 15:49:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2022-03-15 15:49:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.230769230769231) internal successors, (145), 65 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 145 transitions. [2022-03-15 15:49:17,336 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 145 transitions. Word has length 15 [2022-03-15 15:49:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:17,336 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 145 transitions. [2022-03-15 15:49:17,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 145 transitions. [2022-03-15 15:49:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:17,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:17,337 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:17,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:17,553 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,SelfDestructingSolverStorable23 [2022-03-15 15:49:17,554 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:17,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1337735547, now seen corresponding path program 11 times [2022-03-15 15:49:17,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:17,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327100116] [2022-03-15 15:49:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:17,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:17,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:17,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327100116] [2022-03-15 15:49:17,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327100116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:17,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415946533] [2022-03-15 15:49:17,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:17,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:17,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:17,604 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) [2022-03-15 15:49:17,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 15:49:17,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:17,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:17,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:17,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:17,744 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 54 treesize of output 42 [2022-03-15 15:49:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:17,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:17,814 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:17,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:49:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:17,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415946533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:17,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:17,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:49:17,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212282637] [2022-03-15 15:49:17,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:17,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:49:17,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:49:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:17,835 INFO L87 Difference]: Start difference. First operand 66 states and 145 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:17,903 INFO L93 Difference]: Finished difference Result 102 states and 209 transitions. [2022-03-15 15:49:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:17,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:17,904 INFO L225 Difference]: With dead ends: 102 [2022-03-15 15:49:17,905 INFO L226 Difference]: Without dead ends: 96 [2022-03-15 15:49:17,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:49:17,905 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:17,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 63 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:49:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-15 15:49:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 67. [2022-03-15 15:49:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.227272727272727) internal successors, (147), 66 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 147 transitions. [2022-03-15 15:49:17,909 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 147 transitions. Word has length 15 [2022-03-15 15:49:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:17,910 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 147 transitions. [2022-03-15 15:49:17,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 147 transitions. [2022-03-15 15:49:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:17,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:17,910 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:17,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:18,111 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,SelfDestructingSolverStorable24 [2022-03-15 15:49:18,111 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:18,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:18,111 INFO L85 PathProgramCache]: Analyzing trace with hash -472300037, now seen corresponding path program 12 times [2022-03-15 15:49:18,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:18,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237361676] [2022-03-15 15:49:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:18,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:18,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:18,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237361676] [2022-03-15 15:49:18,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237361676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:18,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857198717] [2022-03-15 15:49:18,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:18,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:18,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:18,190 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) [2022-03-15 15:49:18,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 15:49:18,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:49:18,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:18,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:18,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:18,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:18,431 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:18,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-15 15:49:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:18,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857198717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:18,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:18,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:49:18,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812872465] [2022-03-15 15:49:18,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:18,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:49:18,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:18,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:49:18,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:49:18,435 INFO L87 Difference]: Start difference. First operand 67 states and 147 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:18,534 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2022-03-15 15:49:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:18,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:18,535 INFO L225 Difference]: With dead ends: 90 [2022-03-15 15:49:18,535 INFO L226 Difference]: Without dead ends: 90 [2022-03-15 15:49:18,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:18,538 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:18,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-15 15:49:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 67. [2022-03-15 15:49:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.227272727272727) internal successors, (147), 66 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 147 transitions. [2022-03-15 15:49:18,543 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 147 transitions. Word has length 15 [2022-03-15 15:49:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:18,543 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 147 transitions. [2022-03-15 15:49:18,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 147 transitions. [2022-03-15 15:49:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:18,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:18,544 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:18,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:18,755 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,SelfDestructingSolverStorable25 [2022-03-15 15:49:18,755 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:18,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:18,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1258354057, now seen corresponding path program 13 times [2022-03-15 15:49:18,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:18,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489893396] [2022-03-15 15:49:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:18,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:18,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:18,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489893396] [2022-03-15 15:49:18,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489893396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:18,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637683440] [2022-03-15 15:49:18,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:18,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:18,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:18,805 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) [2022-03-15 15:49:18,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 15:49:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:18,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:18,934 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 72 treesize of output 56 [2022-03-15 15:49:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:18,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:19,082 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:19,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:49:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:19,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637683440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:19,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:19,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:49:19,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314008525] [2022-03-15 15:49:19,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:19,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:49:19,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:19,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:49:19,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:19,107 INFO L87 Difference]: Start difference. First operand 67 states and 147 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:19,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:19,288 INFO L93 Difference]: Finished difference Result 117 states and 234 transitions. [2022-03-15 15:49:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:19,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:19,288 INFO L225 Difference]: With dead ends: 117 [2022-03-15 15:49:19,289 INFO L226 Difference]: Without dead ends: 114 [2022-03-15 15:49:19,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:19,289 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:19,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 61 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-15 15:49:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2022-03-15 15:49:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.23943661971831) internal successors, (159), 71 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 159 transitions. [2022-03-15 15:49:19,291 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 159 transitions. Word has length 15 [2022-03-15 15:49:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:19,291 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 159 transitions. [2022-03-15 15:49:19,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 159 transitions. [2022-03-15 15:49:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:19,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:19,292 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:19,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:19,496 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,SelfDestructingSolverStorable26 [2022-03-15 15:49:19,496 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:19,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:19,498 INFO L85 PathProgramCache]: Analyzing trace with hash -624005641, now seen corresponding path program 14 times [2022-03-15 15:49:19,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:19,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80190490] [2022-03-15 15:49:19,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:19,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:19,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:19,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80190490] [2022-03-15 15:49:19,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80190490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:19,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924425204] [2022-03-15 15:49:19,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:19,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:19,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:19,553 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) [2022-03-15 15:49:19,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 15:49:19,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:19,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:19,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:19,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:19,661 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 54 treesize of output 42 [2022-03-15 15:49:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:19,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:19,837 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:19,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-15 15:49:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:19,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924425204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:19,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:19,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:49:19,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125743825] [2022-03-15 15:49:19,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:19,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:49:19,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:49:19,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:19,842 INFO L87 Difference]: Start difference. First operand 72 states and 159 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:19,957 INFO L93 Difference]: Finished difference Result 104 states and 212 transitions. [2022-03-15 15:49:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:19,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:19,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:19,962 INFO L225 Difference]: With dead ends: 104 [2022-03-15 15:49:19,963 INFO L226 Difference]: Without dead ends: 104 [2022-03-15 15:49:19,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:49:19,963 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:19,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 56 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:19,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-15 15:49:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2022-03-15 15:49:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.23943661971831) internal successors, (159), 71 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 159 transitions. [2022-03-15 15:49:19,965 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 159 transitions. Word has length 15 [2022-03-15 15:49:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:19,965 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 159 transitions. [2022-03-15 15:49:19,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 159 transitions. [2022-03-15 15:49:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:19,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:19,966 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:19,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:20,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:20,179 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:20,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1840857063, now seen corresponding path program 15 times [2022-03-15 15:49:20,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:20,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763211298] [2022-03-15 15:49:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:20,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:20,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:20,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763211298] [2022-03-15 15:49:20,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763211298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:20,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268364221] [2022-03-15 15:49:20,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:20,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:20,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:20,242 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) [2022-03-15 15:49:20,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 15:49:20,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:49:20,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:20,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:20,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:20,359 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 54 treesize of output 42 [2022-03-15 15:49:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:20,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:20,485 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:20,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-03-15 15:49:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:20,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268364221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:20,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:20,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:49:20,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123605152] [2022-03-15 15:49:20,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:20,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:49:20,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:20,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:49:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:49:20,490 INFO L87 Difference]: Start difference. First operand 72 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:49:20,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:20,557 INFO L93 Difference]: Finished difference Result 85 states and 179 transitions. [2022-03-15 15:49:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:20,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 15 [2022-03-15 15:49:20,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:20,557 INFO L225 Difference]: With dead ends: 85 [2022-03-15 15:49:20,557 INFO L226 Difference]: Without dead ends: 83 [2022-03-15 15:49:20,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:20,562 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:20,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 32 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:49:20,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-15 15:49:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2022-03-15 15:49:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.2253521126760565) internal successors, (158), 71 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 158 transitions. [2022-03-15 15:49:20,565 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 158 transitions. Word has length 15 [2022-03-15 15:49:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:20,565 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 158 transitions. [2022-03-15 15:49:20,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:49:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 158 transitions. [2022-03-15 15:49:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:20,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:20,565 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:20,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:20,779 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,SelfDestructingSolverStorable28 [2022-03-15 15:49:20,779 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash 736111099, now seen corresponding path program 16 times [2022-03-15 15:49:20,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:20,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747510587] [2022-03-15 15:49:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:20,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:20,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747510587] [2022-03-15 15:49:20,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747510587] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:20,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192858120] [2022-03-15 15:49:20,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:20,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:20,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:20,832 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) [2022-03-15 15:49:20,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 15:49:20,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:20,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:20,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:20,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:20,972 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 72 treesize of output 56 [2022-03-15 15:49:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:21,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:21,108 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:21,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:49:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:21,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192858120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:21,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:21,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 15:49:21,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521988152] [2022-03-15 15:49:21,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:21,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:49:21,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:21,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:49:21,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:49:21,138 INFO L87 Difference]: Start difference. First operand 72 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2022-03-15 15:49:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:21,246 INFO L93 Difference]: Finished difference Result 100 states and 209 transitions. [2022-03-15 15:49:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:21,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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 15 [2022-03-15 15:49:21,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:21,246 INFO L225 Difference]: With dead ends: 100 [2022-03-15 15:49:21,246 INFO L226 Difference]: Without dead ends: 100 [2022-03-15 15:49:21,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:49:21,247 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:21,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 59 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-15 15:49:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 68. [2022-03-15 15:49:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.2238805970149254) internal successors, (149), 67 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 149 transitions. [2022-03-15 15:49:21,249 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 149 transitions. Word has length 15 [2022-03-15 15:49:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:21,249 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 149 transitions. [2022-03-15 15:49:21,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2022-03-15 15:49:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 149 transitions. [2022-03-15 15:49:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:21,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:21,249 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:21,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:21,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:21,450 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:21,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:21,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1387432169, now seen corresponding path program 17 times [2022-03-15 15:49:21,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:21,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524629824] [2022-03-15 15:49:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:21,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:21,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:21,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524629824] [2022-03-15 15:49:21,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524629824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:21,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779304829] [2022-03-15 15:49:21,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:21,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:21,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:21,494 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) [2022-03-15 15:49:21,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 15:49:21,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:21,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:21,633 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 54 treesize of output 42 [2022-03-15 15:49:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:21,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:21,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:21,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:49:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:21,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779304829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:21,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:21,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:49:21,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802162600] [2022-03-15 15:49:21,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:21,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:49:21,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:21,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:49:21,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:49:21,778 INFO L87 Difference]: Start difference. First operand 68 states and 149 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:21,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:21,852 INFO L93 Difference]: Finished difference Result 79 states and 165 transitions. [2022-03-15 15:49:21,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:21,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:21,853 INFO L225 Difference]: With dead ends: 79 [2022-03-15 15:49:21,853 INFO L226 Difference]: Without dead ends: 73 [2022-03-15 15:49:21,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:21,854 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:21,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-15 15:49:21,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2022-03-15 15:49:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.208955223880597) internal successors, (148), 67 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 148 transitions. [2022-03-15 15:49:21,855 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 148 transitions. Word has length 15 [2022-03-15 15:49:21,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:21,856 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 148 transitions. [2022-03-15 15:49:21,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:21,856 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 148 transitions. [2022-03-15 15:49:21,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:21,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:21,856 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:21,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:22,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:22,064 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:22,064 INFO L85 PathProgramCache]: Analyzing trace with hash -422603415, now seen corresponding path program 18 times [2022-03-15 15:49:22,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:22,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073444629] [2022-03-15 15:49:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:22,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:22,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:22,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073444629] [2022-03-15 15:49:22,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073444629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:22,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515436808] [2022-03-15 15:49:22,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:22,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:22,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:22,142 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) [2022-03-15 15:49:22,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 15:49:22,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:49:22,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:22,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:22,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:22,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:22,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:22,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:49:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:22,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515436808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:22,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:22,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-15 15:49:22,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756926575] [2022-03-15 15:49:22,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:22,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:49:22,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:22,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:49:22,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:49:22,432 INFO L87 Difference]: Start difference. First operand 68 states and 148 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:22,514 INFO L93 Difference]: Finished difference Result 81 states and 173 transitions. [2022-03-15 15:49:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:22,514 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:22,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:22,515 INFO L225 Difference]: With dead ends: 81 [2022-03-15 15:49:22,515 INFO L226 Difference]: Without dead ends: 81 [2022-03-15 15:49:22,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:22,516 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:22,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 50 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:49:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-15 15:49:22,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2022-03-15 15:49:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.208955223880597) internal successors, (148), 67 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 148 transitions. [2022-03-15 15:49:22,524 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 148 transitions. Word has length 15 [2022-03-15 15:49:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:22,525 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 148 transitions. [2022-03-15 15:49:22,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 148 transitions. [2022-03-15 15:49:22,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:22,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:22,525 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:22,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:22,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:22,735 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:22,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1208657435, now seen corresponding path program 19 times [2022-03-15 15:49:22,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:22,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682062759] [2022-03-15 15:49:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:22,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:22,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:22,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682062759] [2022-03-15 15:49:22,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682062759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:22,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345131829] [2022-03-15 15:49:22,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:22,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:22,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:22,785 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) [2022-03-15 15:49:22,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 15:49:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:22,952 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 75 treesize of output 59 [2022-03-15 15:49:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:23,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:23,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:23,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:49:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:23,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345131829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:23,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:23,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:49:23,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763385272] [2022-03-15 15:49:23,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:23,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:49:23,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:23,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:49:23,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:23,158 INFO L87 Difference]: Start difference. First operand 68 states and 148 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:23,261 INFO L93 Difference]: Finished difference Result 94 states and 190 transitions. [2022-03-15 15:49:23,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:23,262 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:23,262 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:49:23,262 INFO L226 Difference]: Without dead ends: 91 [2022-03-15 15:49:23,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:49:23,263 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:23,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 69 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:23,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-15 15:49:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2022-03-15 15:49:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 72 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 160 transitions. [2022-03-15 15:49:23,264 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 160 transitions. Word has length 15 [2022-03-15 15:49:23,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:23,264 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 160 transitions. [2022-03-15 15:49:23,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 160 transitions. [2022-03-15 15:49:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:23,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:23,265 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:23,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:23,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:23,465 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash -574309019, now seen corresponding path program 20 times [2022-03-15 15:49:23,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:23,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708282399] [2022-03-15 15:49:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:23,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:23,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:23,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708282399] [2022-03-15 15:49:23,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708282399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:23,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165750222] [2022-03-15 15:49:23,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:23,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:23,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:23,545 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) [2022-03-15 15:49:23,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 15:49:23,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:23,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:23,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:23,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:23,656 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 54 treesize of output 42 [2022-03-15 15:49:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:23,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:23,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:23,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:49:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:23,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165750222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:23,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:23,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:49:23,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365999813] [2022-03-15 15:49:23,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:23,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:49:23,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:23,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:49:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:23,847 INFO L87 Difference]: Start difference. First operand 73 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:23,967 INFO L93 Difference]: Finished difference Result 107 states and 219 transitions. [2022-03-15 15:49:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:23,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:23,968 INFO L225 Difference]: With dead ends: 107 [2022-03-15 15:49:23,968 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 15:49:23,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:49:23,968 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:23,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 85 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 15:49:23,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2022-03-15 15:49:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 72 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 160 transitions. [2022-03-15 15:49:23,970 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 160 transitions. Word has length 15 [2022-03-15 15:49:23,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:23,971 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 160 transitions. [2022-03-15 15:49:23,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:23,971 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 160 transitions. [2022-03-15 15:49:23,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:23,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:23,971 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:24,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-15 15:49:24,179 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,SelfDestructingSolverStorable33 [2022-03-15 15:49:24,179 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:24,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1791160441, now seen corresponding path program 21 times [2022-03-15 15:49:24,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:24,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116376140] [2022-03-15 15:49:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:24,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:24,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:24,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116376140] [2022-03-15 15:49:24,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116376140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:24,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754777678] [2022-03-15 15:49:24,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:24,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:24,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:24,247 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) [2022-03-15 15:49:24,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 15:49:24,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:49:24,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:24,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:24,365 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 54 treesize of output 42 [2022-03-15 15:49:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:24,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:24,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:24,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:49:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:24,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754777678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:24,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:24,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:49:24,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867530926] [2022-03-15 15:49:24,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:24,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:49:24,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:24,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:49:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:24,540 INFO L87 Difference]: Start difference. First operand 73 states and 160 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:24,620 INFO L93 Difference]: Finished difference Result 88 states and 186 transitions. [2022-03-15 15:49:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:24,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:24,621 INFO L225 Difference]: With dead ends: 88 [2022-03-15 15:49:24,621 INFO L226 Difference]: Without dead ends: 86 [2022-03-15 15:49:24,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:24,622 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:24,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 67 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-15 15:49:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2022-03-15 15:49:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.2083333333333335) internal successors, (159), 72 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 159 transitions. [2022-03-15 15:49:24,623 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 159 transitions. Word has length 15 [2022-03-15 15:49:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:24,623 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 159 transitions. [2022-03-15 15:49:24,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 159 transitions. [2022-03-15 15:49:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:24,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:24,624 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:24,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:24,824 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,SelfDestructingSolverStorable34 [2022-03-15 15:49:24,824 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:24,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:24,825 INFO L85 PathProgramCache]: Analyzing trace with hash 785807721, now seen corresponding path program 22 times [2022-03-15 15:49:24,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:24,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832103051] [2022-03-15 15:49:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:24,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:24,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832103051] [2022-03-15 15:49:24,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832103051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:24,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607145504] [2022-03-15 15:49:24,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:24,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:24,946 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) [2022-03-15 15:49:24,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 15:49:25,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:25,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:25,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:25,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:25,111 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 75 treesize of output 59 [2022-03-15 15:49:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:25,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:25,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:25,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:49:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:25,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607145504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:25,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:25,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:49:25,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69869142] [2022-03-15 15:49:25,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:25,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:49:25,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:25,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:49:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:25,293 INFO L87 Difference]: Start difference. First operand 73 states and 159 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:25,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:25,350 INFO L93 Difference]: Finished difference Result 77 states and 165 transitions. [2022-03-15 15:49:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:25,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:25,351 INFO L225 Difference]: With dead ends: 77 [2022-03-15 15:49:25,351 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:49:25,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:25,352 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:25,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:49:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-03-15 15:49:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.212121212121212) internal successors, (146), 66 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:25,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 146 transitions. [2022-03-15 15:49:25,353 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 146 transitions. Word has length 15 [2022-03-15 15:49:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:25,353 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 146 transitions. [2022-03-15 15:49:25,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 146 transitions. [2022-03-15 15:49:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:25,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:25,354 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:25,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:25,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:25,569 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:25,569 INFO L85 PathProgramCache]: Analyzing trace with hash -476968019, now seen corresponding path program 23 times [2022-03-15 15:49:25,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:25,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293752248] [2022-03-15 15:49:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:25,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:25,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:25,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293752248] [2022-03-15 15:49:25,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293752248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:25,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318943844] [2022-03-15 15:49:25,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:25,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:25,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:25,608 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) [2022-03-15 15:49:25,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 15:49:25,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:25,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:25,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:25,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:25,717 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 54 treesize of output 42 [2022-03-15 15:49:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:25,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:25,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:25,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:49:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:25,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318943844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:25,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:25,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:49:25,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513086620] [2022-03-15 15:49:25,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:25,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:49:25,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:25,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:49:25,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:25,839 INFO L87 Difference]: Start difference. First operand 67 states and 146 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:25,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:25,913 INFO L93 Difference]: Finished difference Result 115 states and 233 transitions. [2022-03-15 15:49:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:25,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:25,915 INFO L225 Difference]: With dead ends: 115 [2022-03-15 15:49:25,915 INFO L226 Difference]: Without dead ends: 115 [2022-03-15 15:49:25,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:49:25,928 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:25,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 96 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:49:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-15 15:49:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 71. [2022-03-15 15:49:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.2857142857142856) internal successors, (160), 70 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 160 transitions. [2022-03-15 15:49:25,930 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 160 transitions. Word has length 15 [2022-03-15 15:49:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:25,930 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 160 transitions. [2022-03-15 15:49:25,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 160 transitions. [2022-03-15 15:49:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:25,931 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:25,931 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:25,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:26,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:26,146 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:26,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:26,147 INFO L85 PathProgramCache]: Analyzing trace with hash 934878313, now seen corresponding path program 24 times [2022-03-15 15:49:26,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:26,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657218712] [2022-03-15 15:49:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:26,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:26,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:26,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657218712] [2022-03-15 15:49:26,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657218712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:26,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635549070] [2022-03-15 15:49:26,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:26,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:26,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:26,196 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) [2022-03-15 15:49:26,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 15:49:26,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:49:26,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:26,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:26,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:26,303 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 54 treesize of output 42 [2022-03-15 15:49:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:26,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:26,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:26,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:49:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:26,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635549070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:26,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:26,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:49:26,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571982128] [2022-03-15 15:49:26,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:26,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:49:26,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:49:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:49:26,415 INFO L87 Difference]: Start difference. First operand 71 states and 160 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:49:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:26,457 INFO L93 Difference]: Finished difference Result 80 states and 173 transitions. [2022-03-15 15:49:26,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:26,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 15 [2022-03-15 15:49:26,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:26,458 INFO L225 Difference]: With dead ends: 80 [2022-03-15 15:49:26,458 INFO L226 Difference]: Without dead ends: 76 [2022-03-15 15:49:26,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:26,458 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:26,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:49:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-15 15:49:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-03-15 15:49:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.2714285714285714) internal successors, (159), 70 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:26,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 159 transitions. [2022-03-15 15:49:26,460 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 159 transitions. Word has length 15 [2022-03-15 15:49:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:26,460 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 159 transitions. [2022-03-15 15:49:26,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:49:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 159 transitions. [2022-03-15 15:49:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:26,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:26,460 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:26,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:26,675 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,SelfDestructingSolverStorable37 [2022-03-15 15:49:26,676 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:26,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:26,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1671828517, now seen corresponding path program 25 times [2022-03-15 15:49:26,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:26,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096693185] [2022-03-15 15:49:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:26,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:26,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:26,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096693185] [2022-03-15 15:49:26,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096693185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:26,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362090345] [2022-03-15 15:49:26,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:26,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:26,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:26,756 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) [2022-03-15 15:49:26,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 15:49:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:26,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:26,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:26,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:26,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:26,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:49:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:26,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362090345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:26,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:26,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:49:26,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648291961] [2022-03-15 15:49:26,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:26,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:49:26,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:26,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:49:26,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:49:26,977 INFO L87 Difference]: Start difference. First operand 71 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:49:27,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:27,032 INFO L93 Difference]: Finished difference Result 83 states and 178 transitions. [2022-03-15 15:49:27,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:27,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 15 [2022-03-15 15:49:27,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:27,033 INFO L225 Difference]: With dead ends: 83 [2022-03-15 15:49:27,033 INFO L226 Difference]: Without dead ends: 83 [2022-03-15 15:49:27,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:49:27,033 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:27,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-15 15:49:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2022-03-15 15:49:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.208955223880597) internal successors, (148), 67 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 148 transitions. [2022-03-15 15:49:27,035 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 148 transitions. Word has length 15 [2022-03-15 15:49:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:27,035 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 148 transitions. [2022-03-15 15:49:27,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:49:27,035 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 148 transitions. [2022-03-15 15:49:27,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:27,035 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:27,035 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:27,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:27,236 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,SelfDestructingSolverStorable38 [2022-03-15 15:49:27,236 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:27,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash -937344841, now seen corresponding path program 26 times [2022-03-15 15:49:27,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:27,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70259116] [2022-03-15 15:49:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:27,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:27,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:27,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70259116] [2022-03-15 15:49:27,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70259116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:27,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991980118] [2022-03-15 15:49:27,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:27,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:27,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:27,289 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) [2022-03-15 15:49:27,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 15:49:27,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:27,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:27,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:27,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:27,403 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 75 treesize of output 59 [2022-03-15 15:49:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:27,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:27,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:27,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:49:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:27,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991980118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:27,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:27,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:49:27,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326053474] [2022-03-15 15:49:27,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:27,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:49:27,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:27,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:49:27,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:27,606 INFO L87 Difference]: Start difference. First operand 68 states and 148 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:27,706 INFO L93 Difference]: Finished difference Result 89 states and 181 transitions. [2022-03-15 15:49:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:27,706 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:27,707 INFO L225 Difference]: With dead ends: 89 [2022-03-15 15:49:27,707 INFO L226 Difference]: Without dead ends: 86 [2022-03-15 15:49:27,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:49:27,707 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:27,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 61 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-15 15:49:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2022-03-15 15:49:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.2222222222222223) internal successors, (160), 72 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:27,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 160 transitions. [2022-03-15 15:49:27,709 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 160 transitions. Word has length 15 [2022-03-15 15:49:27,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:27,709 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 160 transitions. [2022-03-15 15:49:27,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:27,709 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 160 transitions. [2022-03-15 15:49:27,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:27,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:27,709 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:27,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:27,910 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,SelfDestructingSolverStorable39 [2022-03-15 15:49:27,910 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:27,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:27,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1519847847, now seen corresponding path program 27 times [2022-03-15 15:49:27,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:27,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992454629] [2022-03-15 15:49:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:27,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:27,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:27,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992454629] [2022-03-15 15:49:27,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992454629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:27,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114869124] [2022-03-15 15:49:27,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:27,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:27,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:27,980 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) [2022-03-15 15:49:27,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 15:49:28,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:49:28,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:28,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:28,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:28,095 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 54 treesize of output 42 [2022-03-15 15:49:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:28,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:28,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:28,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:49:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:28,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114869124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:28,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:28,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:49:28,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144151290] [2022-03-15 15:49:28,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:28,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:49:28,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:49:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:28,250 INFO L87 Difference]: Start difference. First operand 73 states and 160 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:28,326 INFO L93 Difference]: Finished difference Result 82 states and 175 transitions. [2022-03-15 15:49:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:28,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:28,326 INFO L225 Difference]: With dead ends: 82 [2022-03-15 15:49:28,326 INFO L226 Difference]: Without dead ends: 80 [2022-03-15 15:49:28,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:28,327 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:28,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 47 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:28,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-15 15:49:28,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-03-15 15:49:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1971830985915495) internal successors, (156), 71 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 156 transitions. [2022-03-15 15:49:28,328 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 156 transitions. Word has length 15 [2022-03-15 15:49:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:28,328 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 156 transitions. [2022-03-15 15:49:28,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 156 transitions. [2022-03-15 15:49:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:28,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:28,329 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:28,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:28,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:28,529 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:28,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1057120315, now seen corresponding path program 28 times [2022-03-15 15:49:28,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:28,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921905579] [2022-03-15 15:49:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:28,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:28,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:28,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921905579] [2022-03-15 15:49:28,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921905579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:28,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263602478] [2022-03-15 15:49:28,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:28,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:28,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:28,601 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) [2022-03-15 15:49:28,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 15:49:28,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:28,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:28,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:28,720 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 72 treesize of output 56 [2022-03-15 15:49:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:28,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:28,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:28,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:49:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:28,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263602478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:28,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:28,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:49:28,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319092445] [2022-03-15 15:49:28,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:28,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:49:28,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:28,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:49:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:28,917 INFO L87 Difference]: Start difference. First operand 72 states and 156 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:28,960 INFO L93 Difference]: Finished difference Result 71 states and 153 transitions. [2022-03-15 15:49:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:28,960 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:28,967 INFO L225 Difference]: With dead ends: 71 [2022-03-15 15:49:28,967 INFO L226 Difference]: Without dead ends: 71 [2022-03-15 15:49:28,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:28,967 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:28,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:49:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-15 15:49:28,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-03-15 15:49:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.2) internal successors, (143), 65 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 143 transitions. [2022-03-15 15:49:28,981 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 143 transitions. Word has length 15 [2022-03-15 15:49:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:28,981 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 143 transitions. [2022-03-15 15:49:28,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 143 transitions. [2022-03-15 15:49:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:28,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:28,981 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:28,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-15 15:49:29,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:29,195 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash -205655425, now seen corresponding path program 29 times [2022-03-15 15:49:29,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:29,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897368684] [2022-03-15 15:49:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:29,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:29,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:29,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897368684] [2022-03-15 15:49:29,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897368684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:29,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936827207] [2022-03-15 15:49:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:29,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:29,250 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) [2022-03-15 15:49:29,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 15:49:29,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:29,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:29,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:29,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:29,354 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 54 treesize of output 42 [2022-03-15 15:49:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:29,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:29,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:29,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:49:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:29,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936827207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:29,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:29,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:49:29,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327879166] [2022-03-15 15:49:29,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:29,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:49:29,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:29,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:49:29,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:29,499 INFO L87 Difference]: Start difference. First operand 66 states and 143 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:29,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:29,603 INFO L93 Difference]: Finished difference Result 107 states and 214 transitions. [2022-03-15 15:49:29,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:29,603 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:29,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:29,604 INFO L225 Difference]: With dead ends: 107 [2022-03-15 15:49:29,604 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 15:49:29,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:49:29,605 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:29,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 108 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 15:49:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 68. [2022-03-15 15:49:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.2388059701492535) internal successors, (150), 67 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 150 transitions. [2022-03-15 15:49:29,607 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 150 transitions. Word has length 15 [2022-03-15 15:49:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:29,608 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 150 transitions. [2022-03-15 15:49:29,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 150 transitions. [2022-03-15 15:49:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:29,608 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:29,608 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:29,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:29,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:29,823 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1206190907, now seen corresponding path program 30 times [2022-03-15 15:49:29,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:29,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697748653] [2022-03-15 15:49:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:29,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:29,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:29,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697748653] [2022-03-15 15:49:29,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697748653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:29,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975374037] [2022-03-15 15:49:29,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:29,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:29,860 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) [2022-03-15 15:49:29,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 15:49:29,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:49:29,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:29,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:29,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:29,982 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 54 treesize of output 42 [2022-03-15 15:49:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:30,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:30,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:30,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:49:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:30,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975374037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:30,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:30,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:49:30,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128520303] [2022-03-15 15:49:30,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:30,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:49:30,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:30,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:49:30,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:49:30,126 INFO L87 Difference]: Start difference. First operand 68 states and 150 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:49:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:30,193 INFO L93 Difference]: Finished difference Result 72 states and 154 transitions. [2022-03-15 15:49:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 15 [2022-03-15 15:49:30,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:30,194 INFO L225 Difference]: With dead ends: 72 [2022-03-15 15:49:30,194 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 15:49:30,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:30,194 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:30,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:49:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 15:49:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-03-15 15:49:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.2238805970149254) internal successors, (149), 67 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:30,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 149 transitions. [2022-03-15 15:49:30,196 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 149 transitions. Word has length 15 [2022-03-15 15:49:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:30,196 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 149 transitions. [2022-03-15 15:49:30,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:49:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 149 transitions. [2022-03-15 15:49:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:30,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:30,196 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:30,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:30,411 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,SelfDestructingSolverStorable43 [2022-03-15 15:49:30,411 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:30,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:30,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1943141111, now seen corresponding path program 31 times [2022-03-15 15:49:30,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:30,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034869659] [2022-03-15 15:49:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:30,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:30,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:30,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034869659] [2022-03-15 15:49:30,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034869659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:30,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796424255] [2022-03-15 15:49:30,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:30,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:30,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:30,452 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) [2022-03-15 15:49:30,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 15:49:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:30,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:30,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:30,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:30,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:30,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:49:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:30,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796424255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:30,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:30,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:49:30,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447570438] [2022-03-15 15:49:30,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:30,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:49:30,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:30,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:49:30,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:30,657 INFO L87 Difference]: Start difference. First operand 68 states and 149 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:30,727 INFO L93 Difference]: Finished difference Result 75 states and 159 transitions. [2022-03-15 15:49:30,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:30,728 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:30,728 INFO L225 Difference]: With dead ends: 75 [2022-03-15 15:49:30,728 INFO L226 Difference]: Without dead ends: 75 [2022-03-15 15:49:30,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:30,728 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:30,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-15 15:49:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2022-03-15 15:49:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 135 transitions. [2022-03-15 15:49:30,730 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 135 transitions. Word has length 15 [2022-03-15 15:49:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:30,730 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 135 transitions. [2022-03-15 15:49:30,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:30,730 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 135 transitions. [2022-03-15 15:49:30,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:30,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:30,730 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:30,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:30,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:30,936 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:30,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:30,942 INFO L85 PathProgramCache]: Analyzing trace with hash -77859085, now seen corresponding path program 32 times [2022-03-15 15:49:30,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:30,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066654618] [2022-03-15 15:49:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:30,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:30,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:30,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066654618] [2022-03-15 15:49:30,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066654618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:30,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714492630] [2022-03-15 15:49:30,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:30,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:31,013 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) [2022-03-15 15:49:31,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 15:49:31,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:31,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:31,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:31,123 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 54 treesize of output 42 [2022-03-15 15:49:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:31,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:31,242 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:31,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-15 15:49:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:31,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714492630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:31,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:31,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-15 15:49:31,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510477063] [2022-03-15 15:49:31,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:31,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:49:31,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:31,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:49:31,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:49:31,246 INFO L87 Difference]: Start difference. First operand 64 states and 135 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:49:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:31,315 INFO L93 Difference]: Finished difference Result 89 states and 173 transitions. [2022-03-15 15:49:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:31,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 15 [2022-03-15 15:49:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:31,315 INFO L225 Difference]: With dead ends: 89 [2022-03-15 15:49:31,315 INFO L226 Difference]: Without dead ends: 86 [2022-03-15 15:49:31,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:31,316 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:31,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-15 15:49:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2022-03-15 15:49:31,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 146 transitions. [2022-03-15 15:49:31,323 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 146 transitions. Word has length 15 [2022-03-15 15:49:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:31,323 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 146 transitions. [2022-03-15 15:49:31,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2022-03-15 15:49:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 146 transitions. [2022-03-15 15:49:31,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:31,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:31,323 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:31,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:31,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:31,539 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:31,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:31,539 INFO L85 PathProgramCache]: Analyzing trace with hash -660362091, now seen corresponding path program 33 times [2022-03-15 15:49:31,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:31,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453546194] [2022-03-15 15:49:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:31,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:31,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:31,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453546194] [2022-03-15 15:49:31,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453546194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:31,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898884111] [2022-03-15 15:49:31,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:31,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:31,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:31,595 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) [2022-03-15 15:49:31,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 15:49:31,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:49:31,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:31,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:31,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:31,718 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 72 treesize of output 56 [2022-03-15 15:49:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:31,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:31,879 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:31,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:49:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:31,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898884111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:31,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:31,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:49:31,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683087437] [2022-03-15 15:49:31,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:31,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:49:31,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:49:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:31,908 INFO L87 Difference]: Start difference. First operand 69 states and 146 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:32,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:32,038 INFO L93 Difference]: Finished difference Result 108 states and 204 transitions. [2022-03-15 15:49:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:49:32,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:32,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:32,041 INFO L225 Difference]: With dead ends: 108 [2022-03-15 15:49:32,041 INFO L226 Difference]: Without dead ends: 104 [2022-03-15 15:49:32,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:49:32,041 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:32,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 83 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-15 15:49:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2022-03-15 15:49:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 67 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 141 transitions. [2022-03-15 15:49:32,044 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 141 transitions. Word has length 15 [2022-03-15 15:49:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:32,044 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 141 transitions. [2022-03-15 15:49:32,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 141 transitions. [2022-03-15 15:49:32,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:32,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:32,044 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:32,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:32,255 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,SelfDestructingSolverStorable46 [2022-03-15 15:49:32,255 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:32,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1916606071, now seen corresponding path program 34 times [2022-03-15 15:49:32,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:32,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125299890] [2022-03-15 15:49:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:32,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:32,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:32,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125299890] [2022-03-15 15:49:32,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125299890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:32,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773908535] [2022-03-15 15:49:32,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:32,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:32,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:32,302 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) [2022-03-15 15:49:32,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 15:49:32,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:32,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:32,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:32,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:32,407 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 54 treesize of output 42 [2022-03-15 15:49:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:32,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:32,520 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:32,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-15 15:49:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:32,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773908535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:32,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:32,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:49:32,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214707170] [2022-03-15 15:49:32,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:32,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:49:32,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:49:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:32,527 INFO L87 Difference]: Start difference. First operand 68 states and 141 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:32,595 INFO L93 Difference]: Finished difference Result 88 states and 171 transitions. [2022-03-15 15:49:32,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:49:32,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:32,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:32,596 INFO L225 Difference]: With dead ends: 88 [2022-03-15 15:49:32,596 INFO L226 Difference]: Without dead ends: 88 [2022-03-15 15:49:32,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:49:32,597 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:32,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 71 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:49:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-15 15:49:32,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2022-03-15 15:49:32,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 139 transitions. [2022-03-15 15:49:32,620 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 139 transitions. Word has length 15 [2022-03-15 15:49:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:32,620 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 139 transitions. [2022-03-15 15:49:32,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:32,620 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 139 transitions. [2022-03-15 15:49:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:32,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:32,620 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:32,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:32,821 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,SelfDestructingSolverStorable47 [2022-03-15 15:49:32,821 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash -122506513, now seen corresponding path program 35 times [2022-03-15 15:49:32,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:32,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713733083] [2022-03-15 15:49:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:32,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:32,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:32,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713733083] [2022-03-15 15:49:32,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713733083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:32,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255536031] [2022-03-15 15:49:32,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:32,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:32,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:32,860 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) [2022-03-15 15:49:32,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 15:49:32,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:32,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:32,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:32,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:32,979 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 54 treesize of output 42 [2022-03-15 15:49:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:33,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:33,060 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:33,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:49:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:33,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255536031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:33,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:33,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:49:33,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680970031] [2022-03-15 15:49:33,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:33,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:49:33,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:49:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:33,079 INFO L87 Difference]: Start difference. First operand 67 states and 139 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:33,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:33,153 INFO L93 Difference]: Finished difference Result 90 states and 176 transitions. [2022-03-15 15:49:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:33,153 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:33,154 INFO L225 Difference]: With dead ends: 90 [2022-03-15 15:49:33,154 INFO L226 Difference]: Without dead ends: 86 [2022-03-15 15:49:33,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:49:33,154 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:33,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 57 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:49:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-15 15:49:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2022-03-15 15:49:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 138 transitions. [2022-03-15 15:49:33,162 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 138 transitions. Word has length 15 [2022-03-15 15:49:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:33,162 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 138 transitions. [2022-03-15 15:49:33,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 138 transitions. [2022-03-15 15:49:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:33,162 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:33,162 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:33,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:33,371 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,SelfDestructingSolverStorable48 [2022-03-15 15:49:33,371 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -229564689, now seen corresponding path program 36 times [2022-03-15 15:49:33,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:33,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379838149] [2022-03-15 15:49:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:33,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:33,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:33,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379838149] [2022-03-15 15:49:33,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379838149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:33,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382446132] [2022-03-15 15:49:33,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:33,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:33,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:33,440 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) [2022-03-15 15:49:33,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 15:49:33,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:33,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:33,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:33,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:33,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:33,685 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:33,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 19 [2022-03-15 15:49:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:33,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382446132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:33,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:33,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-15 15:49:33,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819483283] [2022-03-15 15:49:33,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:33,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:49:33,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:49:33,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:49:33,701 INFO L87 Difference]: Start difference. First operand 67 states and 138 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:33,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:33,769 INFO L93 Difference]: Finished difference Result 80 states and 162 transitions. [2022-03-15 15:49:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:33,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:33,769 INFO L225 Difference]: With dead ends: 80 [2022-03-15 15:49:33,769 INFO L226 Difference]: Without dead ends: 80 [2022-03-15 15:49:33,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:33,770 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:33,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 50 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:33,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-15 15:49:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2022-03-15 15:49:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 138 transitions. [2022-03-15 15:49:33,771 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 138 transitions. Word has length 15 [2022-03-15 15:49:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:33,771 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 138 transitions. [2022-03-15 15:49:33,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 138 transitions. [2022-03-15 15:49:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:33,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:33,772 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:33,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:33,972 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,SelfDestructingSolverStorable49 [2022-03-15 15:49:33,972 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash 465238809, now seen corresponding path program 37 times [2022-03-15 15:49:33,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:33,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571375002] [2022-03-15 15:49:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:33,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:34,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:34,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571375002] [2022-03-15 15:49:34,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571375002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:34,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657828721] [2022-03-15 15:49:34,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:34,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:34,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:34,017 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) [2022-03-15 15:49:34,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 15:49:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:34,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:34,131 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 54 treesize of output 42 [2022-03-15 15:49:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:34,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:34,180 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:34,180 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 49 treesize of output 40 [2022-03-15 15:49:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:34,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657828721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:34,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:34,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 15:49:34,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957554225] [2022-03-15 15:49:34,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:34,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 15:49:34,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:34,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 15:49:34,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:49:34,195 INFO L87 Difference]: Start difference. First operand 67 states and 138 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-15 15:49:34,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:34,274 INFO L93 Difference]: Finished difference Result 88 states and 172 transitions. [2022-03-15 15:49:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:34,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 15 [2022-03-15 15:49:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:34,275 INFO L225 Difference]: With dead ends: 88 [2022-03-15 15:49:34,275 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 15:49:34,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:49:34,275 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:34,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 57 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:49:34,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 15:49:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2022-03-15 15:49:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.09375) internal successors, (134), 64 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 134 transitions. [2022-03-15 15:49:34,277 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 134 transitions. Word has length 15 [2022-03-15 15:49:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:34,278 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 134 transitions. [2022-03-15 15:49:34,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2022-03-15 15:49:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 134 transitions. [2022-03-15 15:49:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:49:34,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:34,278 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:34,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:34,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:34,493 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:34,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1242257221, now seen corresponding path program 38 times [2022-03-15 15:49:34,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:34,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431148005] [2022-03-15 15:49:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:34,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:34,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:34,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:34,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431148005] [2022-03-15 15:49:34,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431148005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:34,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364318665] [2022-03-15 15:49:34,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:34,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:34,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:34,527 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) [2022-03-15 15:49:34,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 15:49:34,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:34,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:49:34,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:34,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:34,703 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:49:34,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-03-15 15:49:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:34,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364318665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:34,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:34,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 15:49:34,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232212027] [2022-03-15 15:49:34,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:34,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 15:49:34,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 15:49:34,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:49:34,713 INFO L87 Difference]: Start difference. First operand 65 states and 134 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:34,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:34,774 INFO L93 Difference]: Finished difference Result 89 states and 176 transitions. [2022-03-15 15:49:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:49:34,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:49:34,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:34,774 INFO L225 Difference]: With dead ends: 89 [2022-03-15 15:49:34,774 INFO L226 Difference]: Without dead ends: 89 [2022-03-15 15:49:34,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:49:34,804 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:34,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 47 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:49:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-15 15:49:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2022-03-15 15:49:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 122 transitions. [2022-03-15 15:49:34,806 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 122 transitions. Word has length 15 [2022-03-15 15:49:34,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:34,806 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 122 transitions. [2022-03-15 15:49:34,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 122 transitions. [2022-03-15 15:49:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:49:34,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:34,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:34,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:35,023 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,SelfDestructingSolverStorable51 [2022-03-15 15:49:35,023 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:35,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash 48030937, now seen corresponding path program 39 times [2022-03-15 15:49:35,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:35,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652659245] [2022-03-15 15:49:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:35,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:35,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:35,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652659245] [2022-03-15 15:49:35,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652659245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:35,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296534993] [2022-03-15 15:49:35,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:35,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:35,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:35,193 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) [2022-03-15 15:49:35,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 15:49:35,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:49:35,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:35,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:49:35,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:35,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:35,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 102 [2022-03-15 15:49:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:35,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:36,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:36,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-15 15:49:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:36,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296534993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:36,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:36,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:49:36,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272367391] [2022-03-15 15:49:36,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:36,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:49:36,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:36,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:49:36,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:49:36,795 INFO L87 Difference]: Start difference. First operand 60 states and 122 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:37,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:37,008 INFO L93 Difference]: Finished difference Result 105 states and 219 transitions. [2022-03-15 15:49:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:49:37,008 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:49:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:37,009 INFO L225 Difference]: With dead ends: 105 [2022-03-15 15:49:37,009 INFO L226 Difference]: Without dead ends: 98 [2022-03-15 15:49:37,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:49:37,009 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:37,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 134 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 254 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-03-15 15:49:37,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-15 15:49:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2022-03-15 15:49:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 71 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 147 transitions. [2022-03-15 15:49:37,011 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 147 transitions. Word has length 16 [2022-03-15 15:49:37,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:37,011 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 147 transitions. [2022-03-15 15:49:37,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 147 transitions. [2022-03-15 15:49:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:49:37,012 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:37,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:37,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:37,228 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,SelfDestructingSolverStorable52 [2022-03-15 15:49:37,228 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash 246438997, now seen corresponding path program 40 times [2022-03-15 15:49:37,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:37,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61259095] [2022-03-15 15:49:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:37,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:37,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:37,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61259095] [2022-03-15 15:49:37,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61259095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:37,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400433879] [2022-03-15 15:49:37,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:37,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:37,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:37,416 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) [2022-03-15 15:49:37,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 15:49:37,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:37,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:37,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:49:37,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:37,714 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 132 treesize of output 104 [2022-03-15 15:49:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:37,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:38,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:38,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 168 [2022-03-15 15:49:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:38,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400433879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:38,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:38,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:49:38,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914787775] [2022-03-15 15:49:38,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:38,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:49:38,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:49:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:49:38,779 INFO L87 Difference]: Start difference. First operand 72 states and 147 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:40,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:40,422 INFO L93 Difference]: Finished difference Result 183 states and 352 transitions. [2022-03-15 15:49:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:49:40,423 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:49:40,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:40,423 INFO L225 Difference]: With dead ends: 183 [2022-03-15 15:49:40,423 INFO L226 Difference]: Without dead ends: 152 [2022-03-15 15:49:40,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:49:40,424 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:40,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 164 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:49:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-15 15:49:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 74. [2022-03-15 15:49:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 73 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 151 transitions. [2022-03-15 15:49:40,432 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 151 transitions. Word has length 16 [2022-03-15 15:49:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:40,432 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 151 transitions. [2022-03-15 15:49:40,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:40,432 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 151 transitions. [2022-03-15 15:49:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:49:40,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:40,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:40,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:40,647 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,SelfDestructingSolverStorable53 [2022-03-15 15:49:40,647 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:40,647 INFO L85 PathProgramCache]: Analyzing trace with hash -930774393, now seen corresponding path program 41 times [2022-03-15 15:49:40,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:40,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633631970] [2022-03-15 15:49:40,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:40,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:40,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:40,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633631970] [2022-03-15 15:49:40,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633631970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:40,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143069318] [2022-03-15 15:49:40,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:40,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:40,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:40,826 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) [2022-03-15 15:49:40,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 15:49:40,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:40,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:49:40,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:41,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:41,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 104 [2022-03-15 15:49:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:41,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:42,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:42,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 196 [2022-03-15 15:49:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:42,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143069318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:42,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:42,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:49:42,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089643626] [2022-03-15 15:49:42,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:42,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:49:42,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:49:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:49:42,374 INFO L87 Difference]: Start difference. First operand 74 states and 151 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:42,614 INFO L93 Difference]: Finished difference Result 98 states and 194 transitions. [2022-03-15 15:49:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:49:42,614 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:49:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:42,614 INFO L225 Difference]: With dead ends: 98 [2022-03-15 15:49:42,614 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 15:49:42,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:49:42,615 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:42,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 138 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 421 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-03-15 15:49:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 15:49:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-03-15 15:49:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:42,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 155 transitions. [2022-03-15 15:49:42,618 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 155 transitions. Word has length 16 [2022-03-15 15:49:42,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:42,618 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 155 transitions. [2022-03-15 15:49:42,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 155 transitions. [2022-03-15 15:49:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:49:42,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:42,619 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:42,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-15 15:49:42,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:42,834 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:42,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash 768103299, now seen corresponding path program 42 times [2022-03-15 15:49:42,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:42,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317291369] [2022-03-15 15:49:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:42,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:43,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:43,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317291369] [2022-03-15 15:49:43,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317291369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:43,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550878417] [2022-03-15 15:49:43,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:43,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:43,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:43,005 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) [2022-03-15 15:49:43,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 15:49:43,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:49:43,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:49:43,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:43,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:43,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 102 [2022-03-15 15:49:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:43,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:44,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:44,329 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 196 treesize of output 162 [2022-03-15 15:49:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:44,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550878417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:44,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:44,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:49:44,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407967942] [2022-03-15 15:49:44,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:44,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:44,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:44,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:44,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:44,541 INFO L87 Difference]: Start difference. First operand 76 states and 155 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:44,746 INFO L93 Difference]: Finished difference Result 94 states and 190 transitions. [2022-03-15 15:49:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:49:44,746 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:49:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:44,746 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:49:44,746 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 15:49:44,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:49:44,747 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:44,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 103 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 299 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-03-15 15:49:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 15:49:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2022-03-15 15:49:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 162 transitions. [2022-03-15 15:49:44,748 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 162 transitions. Word has length 16 [2022-03-15 15:49:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:44,748 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 162 transitions. [2022-03-15 15:49:44,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 162 transitions. [2022-03-15 15:49:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:49:44,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:44,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:44,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:44,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:44,949 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1824791243, now seen corresponding path program 43 times [2022-03-15 15:49:44,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:44,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149949452] [2022-03-15 15:49:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:44,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:45,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:45,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149949452] [2022-03-15 15:49:45,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149949452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:45,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573971049] [2022-03-15 15:49:45,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:45,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:45,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:45,137 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) [2022-03-15 15:49:45,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 15:49:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:45,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:49:45,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:45,365 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 152 treesize of output 120 [2022-03-15 15:49:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:45,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:46,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:46,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 162 [2022-03-15 15:49:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:46,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573971049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:46,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:46,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:49:46,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803979251] [2022-03-15 15:49:46,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:46,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:46,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:46,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:46,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:46,245 INFO L87 Difference]: Start difference. First operand 79 states and 162 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:46,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:46,746 INFO L93 Difference]: Finished difference Result 104 states and 202 transitions. [2022-03-15 15:49:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:49:46,746 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:49:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:46,746 INFO L225 Difference]: With dead ends: 104 [2022-03-15 15:49:46,746 INFO L226 Difference]: Without dead ends: 101 [2022-03-15 15:49:46,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:49:46,747 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:46,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 172 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:49:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-15 15:49:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2022-03-15 15:49:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 76 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 158 transitions. [2022-03-15 15:49:46,748 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 158 transitions. Word has length 16 [2022-03-15 15:49:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:46,749 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 158 transitions. [2022-03-15 15:49:46,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 158 transitions. [2022-03-15 15:49:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:49:46,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:46,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:46,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 15:49:46,949 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,SelfDestructingSolverStorable56 [2022-03-15 15:49:46,949 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:46,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:46,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1532398841, now seen corresponding path program 44 times [2022-03-15 15:49:46,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:46,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804122267] [2022-03-15 15:49:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:46,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:47,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:47,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804122267] [2022-03-15 15:49:47,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804122267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:47,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557883665] [2022-03-15 15:49:47,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:49:47,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:47,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:47,139 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) [2022-03-15 15:49:47,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 15:49:47,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:49:47,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:47,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:49:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:47,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:47,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 102 [2022-03-15 15:49:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:47,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:48,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:48,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 162 [2022-03-15 15:49:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:48,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557883665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:48,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:48,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:49:48,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692031910] [2022-03-15 15:49:48,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:48,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:48,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:48,723 INFO L87 Difference]: Start difference. First operand 77 states and 158 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:49,072 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2022-03-15 15:49:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:49:49,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:49:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:49,073 INFO L225 Difference]: With dead ends: 104 [2022-03-15 15:49:49,073 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 15:49:49,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:49:49,073 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:49,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 139 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 393 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-03-15 15:49:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 15:49:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2022-03-15 15:49:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.066666666666667) internal successors, (155), 75 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 155 transitions. [2022-03-15 15:49:49,074 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 155 transitions. Word has length 16 [2022-03-15 15:49:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:49,075 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 155 transitions. [2022-03-15 15:49:49,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 155 transitions. [2022-03-15 15:49:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:49:49,075 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:49,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:49,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:49,275 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,SelfDestructingSolverStorable57 [2022-03-15 15:49:49,276 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1338680821, now seen corresponding path program 45 times [2022-03-15 15:49:49,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:49,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559252600] [2022-03-15 15:49:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:49,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:49,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:49,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559252600] [2022-03-15 15:49:49,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559252600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:49,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851567992] [2022-03-15 15:49:49,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:49:49,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:49,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:49,473 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) [2022-03-15 15:49:49,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 15:49:49,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:49:49,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:49,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:49:49,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:49,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:49,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 102 [2022-03-15 15:49:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:50,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:50,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:50,807 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 182 treesize of output 160 [2022-03-15 15:49:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:51,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851567992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:51,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:51,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:49:51,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928639536] [2022-03-15 15:49:51,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:51,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:51,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:51,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:51,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:51,049 INFO L87 Difference]: Start difference. First operand 76 states and 155 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:51,265 INFO L93 Difference]: Finished difference Result 95 states and 192 transitions. [2022-03-15 15:49:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:49:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:49:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:51,266 INFO L225 Difference]: With dead ends: 95 [2022-03-15 15:49:51,266 INFO L226 Difference]: Without dead ends: 88 [2022-03-15 15:49:51,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:49:51,266 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:51,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 123 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-15 15:49:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-15 15:49:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2022-03-15 15:49:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2022-03-15 15:49:51,268 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 16 [2022-03-15 15:49:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:51,268 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2022-03-15 15:49:51,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2022-03-15 15:49:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:49:51,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:51,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:51,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 15:49:51,482 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,SelfDestructingSolverStorable58 [2022-03-15 15:49:51,482 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash -281992877, now seen corresponding path program 46 times [2022-03-15 15:49:51,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:51,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589294713] [2022-03-15 15:49:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:51,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:51,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:51,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589294713] [2022-03-15 15:49:51,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589294713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:51,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73659409] [2022-03-15 15:49:51,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:49:51,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:51,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:51,631 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) [2022-03-15 15:49:51,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 15:49:51,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:49:51,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:49:51,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:52,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:52,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 102 [2022-03-15 15:49:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:52,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:52,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:52,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 179 treesize of output 159 [2022-03-15 15:49:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:53,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73659409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:53,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:53,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:49:53,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774859630] [2022-03-15 15:49:53,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:53,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:49:53,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:53,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:49:53,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:49:53,117 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:53,372 INFO L93 Difference]: Finished difference Result 93 states and 186 transitions. [2022-03-15 15:49:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:49:53,372 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:49:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:53,372 INFO L225 Difference]: With dead ends: 93 [2022-03-15 15:49:53,372 INFO L226 Difference]: Without dead ends: 90 [2022-03-15 15:49:53,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:49:53,373 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:53,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 306 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-03-15 15:49:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-15 15:49:53,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2022-03-15 15:49:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 77 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 160 transitions. [2022-03-15 15:49:53,375 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 160 transitions. Word has length 16 [2022-03-15 15:49:53,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:53,375 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 160 transitions. [2022-03-15 15:49:53,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:53,375 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 160 transitions. [2022-03-15 15:49:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:49:53,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:53,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:53,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:53,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:53,576 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:53,576 INFO L85 PathProgramCache]: Analyzing trace with hash 655784335, now seen corresponding path program 47 times [2022-03-15 15:49:53,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:53,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248219561] [2022-03-15 15:49:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:53,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:53,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:53,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248219561] [2022-03-15 15:49:53,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248219561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:53,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806990929] [2022-03-15 15:49:53,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:49:53,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:53,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:53,818 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) [2022-03-15 15:49:53,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 15:49:53,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:49:53,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:53,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:49:53,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:54,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:54,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 123 [2022-03-15 15:49:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:54,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:55,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:55,299 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 198 treesize of output 176 [2022-03-15 15:49:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:55,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806990929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:55,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:55,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:49:55,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009923419] [2022-03-15 15:49:55,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:55,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:49:55,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:55,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:49:55,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:49:55,527 INFO L87 Difference]: Start difference. First operand 78 states and 160 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) [2022-03-15 15:49:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:57,078 INFO L93 Difference]: Finished difference Result 216 states and 382 transitions. [2022-03-15 15:49:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:49:57,078 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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 16 [2022-03-15 15:49:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:57,079 INFO L225 Difference]: With dead ends: 216 [2022-03-15 15:49:57,079 INFO L226 Difference]: Without dead ends: 162 [2022-03-15 15:49:57,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:49:57,080 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 156 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:57,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 218 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 589 Invalid, 0 Unknown, 11 Unchecked, 0.3s Time] [2022-03-15 15:49:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-15 15:49:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 83. [2022-03-15 15:49:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 82 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 178 transitions. [2022-03-15 15:49:57,081 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 178 transitions. Word has length 16 [2022-03-15 15:49:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:57,081 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 178 transitions. [2022-03-15 15:49:57,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) [2022-03-15 15:49:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 178 transitions. [2022-03-15 15:49:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:49:57,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:57,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:57,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:57,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:57,282 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:57,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1490386425, now seen corresponding path program 48 times [2022-03-15 15:49:57,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:57,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872266284] [2022-03-15 15:49:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:57,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:57,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:57,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872266284] [2022-03-15 15:49:57,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872266284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:57,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003834597] [2022-03-15 15:49:57,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:49:57,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:57,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:57,476 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) [2022-03-15 15:49:57,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 15:49:57,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:49:57,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:49:57,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:49:57,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:49:57,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:49:57,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 120 [2022-03-15 15:49:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:57,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:49:58,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:49:58,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 182 [2022-03-15 15:49:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:58,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003834597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:49:58,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:49:58,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:49:58,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979904629] [2022-03-15 15:49:58,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:49:58,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:49:58,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:49:58,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:49:58,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:49:58,875 INFO L87 Difference]: Start difference. First operand 83 states and 178 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:49:59,210 INFO L93 Difference]: Finished difference Result 110 states and 225 transitions. [2022-03-15 15:49:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:49:59,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:49:59,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:49:59,210 INFO L225 Difference]: With dead ends: 110 [2022-03-15 15:49:59,210 INFO L226 Difference]: Without dead ends: 96 [2022-03-15 15:49:59,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:49:59,211 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:49:59,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 130 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:49:59,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-15 15:49:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2022-03-15 15:49:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.180722891566265) internal successors, (181), 83 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 181 transitions. [2022-03-15 15:49:59,213 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 181 transitions. Word has length 16 [2022-03-15 15:49:59,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:49:59,213 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 181 transitions. [2022-03-15 15:49:59,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:49:59,214 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 181 transitions. [2022-03-15 15:49:59,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:49:59,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:49:59,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:49:59,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 15:49:59,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:59,428 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:49:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:49:59,428 INFO L85 PathProgramCache]: Analyzing trace with hash 609820889, now seen corresponding path program 49 times [2022-03-15 15:49:59,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:49:59,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418450629] [2022-03-15 15:49:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:49:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:49:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:49:59,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:49:59,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418450629] [2022-03-15 15:49:59,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418450629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:49:59,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789977550] [2022-03-15 15:49:59,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:49:59,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:49:59,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:49:59,589 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) [2022-03-15 15:49:59,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 15:49:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:49:59,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:49:59,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:00,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:00,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-03-15 15:50:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:00,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:00,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:00,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 161 [2022-03-15 15:50:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:00,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789977550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:00,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:00,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:50:00,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274557536] [2022-03-15 15:50:00,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:00,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:50:00,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:00,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:50:00,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:50:00,998 INFO L87 Difference]: Start difference. First operand 84 states and 181 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:01,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:01,188 INFO L93 Difference]: Finished difference Result 112 states and 231 transitions. [2022-03-15 15:50:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:50:01,188 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:01,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:01,188 INFO L225 Difference]: With dead ends: 112 [2022-03-15 15:50:01,188 INFO L226 Difference]: Without dead ends: 102 [2022-03-15 15:50:01,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:50:01,189 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:01,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 159 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 387 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-03-15 15:50:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-15 15:50:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2022-03-15 15:50:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1797752808988764) internal successors, (194), 89 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 194 transitions. [2022-03-15 15:50:01,190 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 194 transitions. Word has length 16 [2022-03-15 15:50:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:01,191 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 194 transitions. [2022-03-15 15:50:01,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 194 transitions. [2022-03-15 15:50:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:01,191 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:01,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:01,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:01,391 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,SelfDestructingSolverStorable62 [2022-03-15 15:50:01,392 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:01,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1666508833, now seen corresponding path program 50 times [2022-03-15 15:50:01,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:01,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593833800] [2022-03-15 15:50:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:01,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:01,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:01,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593833800] [2022-03-15 15:50:01,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593833800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:01,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809652287] [2022-03-15 15:50:01,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:50:01,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:01,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:01,603 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) [2022-03-15 15:50:01,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 15:50:01,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:01,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:01,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:01,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:02,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:02,208 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 122 [2022-03-15 15:50:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:02,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:03,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:03,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 161 [2022-03-15 15:50:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:03,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809652287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:03,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:03,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:50:03,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478354601] [2022-03-15 15:50:03,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:03,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:50:03,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:03,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:50:03,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:50:03,374 INFO L87 Difference]: Start difference. First operand 90 states and 194 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:03,564 INFO L93 Difference]: Finished difference Result 105 states and 221 transitions. [2022-03-15 15:50:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:50:03,565 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:03,565 INFO L225 Difference]: With dead ends: 105 [2022-03-15 15:50:03,565 INFO L226 Difference]: Without dead ends: 102 [2022-03-15 15:50:03,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:50:03,565 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:03,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 94 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 276 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-03-15 15:50:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-15 15:50:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2022-03-15 15:50:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1882352941176473) internal successors, (186), 85 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 186 transitions. [2022-03-15 15:50:03,568 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 186 transitions. Word has length 16 [2022-03-15 15:50:03,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:03,568 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 186 transitions. [2022-03-15 15:50:03,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:03,568 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 186 transitions. [2022-03-15 15:50:03,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:03,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:03,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:03,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:03,769 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,SelfDestructingSolverStorable63 [2022-03-15 15:50:03,769 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:03,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1986268715, now seen corresponding path program 51 times [2022-03-15 15:50:03,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:03,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320281341] [2022-03-15 15:50:03,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:03,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:03,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:03,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320281341] [2022-03-15 15:50:03,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320281341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:03,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323866135] [2022-03-15 15:50:03,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:50:03,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:03,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:03,968 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) [2022-03-15 15:50:03,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 15:50:04,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:50:04,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:04,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:04,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:04,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:04,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 102 [2022-03-15 15:50:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:04,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:05,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:05,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 190 [2022-03-15 15:50:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:05,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323866135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:05,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:05,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:50:05,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361164379] [2022-03-15 15:50:05,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:05,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:50:05,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:05,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:50:05,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:50:05,706 INFO L87 Difference]: Start difference. First operand 86 states and 186 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:05,852 INFO L93 Difference]: Finished difference Result 106 states and 224 transitions. [2022-03-15 15:50:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:50:05,852 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:05,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:05,853 INFO L225 Difference]: With dead ends: 106 [2022-03-15 15:50:05,853 INFO L226 Difference]: Without dead ends: 99 [2022-03-15 15:50:05,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:50:05,853 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:05,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 91 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 288 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2022-03-15 15:50:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-15 15:50:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2022-03-15 15:50:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.197674418604651) internal successors, (189), 86 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 189 transitions. [2022-03-15 15:50:05,859 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 189 transitions. Word has length 16 [2022-03-15 15:50:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:05,859 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 189 transitions. [2022-03-15 15:50:05,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 189 transitions. [2022-03-15 15:50:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:05,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:05,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:05,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:06,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:06,062 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash 8196441, now seen corresponding path program 52 times [2022-03-15 15:50:06,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:06,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321754081] [2022-03-15 15:50:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:06,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:06,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:06,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321754081] [2022-03-15 15:50:06,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321754081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:06,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789257207] [2022-03-15 15:50:06,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:50:06,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:06,235 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) [2022-03-15 15:50:06,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 15:50:06,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:50:06,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:06,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:06,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:06,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 109 [2022-03-15 15:50:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:06,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:07,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:07,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 176 [2022-03-15 15:50:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:07,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789257207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:07,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:07,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:50:07,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45772284] [2022-03-15 15:50:07,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:07,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:50:07,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:07,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:50:07,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:50:07,548 INFO L87 Difference]: Start difference. First operand 87 states and 189 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:07,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:07,781 INFO L93 Difference]: Finished difference Result 115 states and 237 transitions. [2022-03-15 15:50:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:50:07,781 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:07,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:07,781 INFO L225 Difference]: With dead ends: 115 [2022-03-15 15:50:07,781 INFO L226 Difference]: Without dead ends: 108 [2022-03-15 15:50:07,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:07,782 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:07,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 104 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 356 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-03-15 15:50:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-15 15:50:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2022-03-15 15:50:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 183 transitions. [2022-03-15 15:50:07,783 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 183 transitions. Word has length 16 [2022-03-15 15:50:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:07,783 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 183 transitions. [2022-03-15 15:50:07,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 183 transitions. [2022-03-15 15:50:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:07,784 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:07,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:07,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:07,999 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,SelfDestructingSolverStorable65 [2022-03-15 15:50:08,000 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash 201914461, now seen corresponding path program 53 times [2022-03-15 15:50:08,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:08,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470136541] [2022-03-15 15:50:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:08,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:08,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:08,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470136541] [2022-03-15 15:50:08,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470136541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:08,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411862592] [2022-03-15 15:50:08,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:50:08,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:08,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:08,128 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) [2022-03-15 15:50:08,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 15:50:08,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:08,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:08,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:50:08,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:08,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:08,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 122 [2022-03-15 15:50:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:08,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:09,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:09,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 207 [2022-03-15 15:50:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:09,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411862592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:09,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:09,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:50:09,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130108703] [2022-03-15 15:50:09,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:09,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:50:09,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:50:09,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:50:09,537 INFO L87 Difference]: Start difference. First operand 85 states and 183 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:10,205 INFO L93 Difference]: Finished difference Result 145 states and 288 transitions. [2022-03-15 15:50:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:50:10,206 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:10,206 INFO L225 Difference]: With dead ends: 145 [2022-03-15 15:50:10,206 INFO L226 Difference]: Without dead ends: 125 [2022-03-15 15:50:10,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:10,207 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:10,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 180 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 422 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-03-15 15:50:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-15 15:50:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 92. [2022-03-15 15:50:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.230769230769231) internal successors, (203), 91 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) [2022-03-15 15:50:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 203 transitions. [2022-03-15 15:50:10,210 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 203 transitions. Word has length 16 [2022-03-15 15:50:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:10,210 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 203 transitions. [2022-03-15 15:50:10,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:10,210 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 203 transitions. [2022-03-15 15:50:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:10,211 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:10,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:10,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:10,411 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,SelfDestructingSolverStorable66 [2022-03-15 15:50:10,411 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:10,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:10,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2098587679, now seen corresponding path program 54 times [2022-03-15 15:50:10,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:10,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912197042] [2022-03-15 15:50:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:10,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:10,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:10,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912197042] [2022-03-15 15:50:10,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912197042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:10,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4442020] [2022-03-15 15:50:10,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:50:10,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:10,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:10,588 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) [2022-03-15 15:50:10,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 15:50:10,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:50:10,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:10,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:10,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:10,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:10,903 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 106 [2022-03-15 15:50:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:11,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:11,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:11,893 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 165 treesize of output 147 [2022-03-15 15:50:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:12,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4442020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:12,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:12,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:50:12,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579181988] [2022-03-15 15:50:12,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:12,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:50:12,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:50:12,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:50:12,229 INFO L87 Difference]: Start difference. First operand 92 states and 203 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:12,540 INFO L93 Difference]: Finished difference Result 118 states and 246 transitions. [2022-03-15 15:50:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:50:12,540 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:12,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:12,541 INFO L225 Difference]: With dead ends: 118 [2022-03-15 15:50:12,541 INFO L226 Difference]: Without dead ends: 111 [2022-03-15 15:50:12,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:50:12,541 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:12,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 120 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 367 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-03-15 15:50:12,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-15 15:50:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2022-03-15 15:50:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.25) internal successors, (207), 92 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 207 transitions. [2022-03-15 15:50:12,543 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 207 transitions. Word has length 16 [2022-03-15 15:50:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:12,543 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 207 transitions. [2022-03-15 15:50:12,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 207 transitions. [2022-03-15 15:50:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:12,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:12,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:12,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 15:50:12,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:12,766 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash 50208857, now seen corresponding path program 55 times [2022-03-15 15:50:12,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:12,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821892429] [2022-03-15 15:50:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:12,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:12,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:12,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821892429] [2022-03-15 15:50:12,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821892429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:12,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114156168] [2022-03-15 15:50:12,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:50:12,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:12,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:12,953 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) [2022-03-15 15:50:12,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 15:50:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:13,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:13,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:13,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 122 [2022-03-15 15:50:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:13,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:14,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:14,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 155 [2022-03-15 15:50:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:14,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114156168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:14,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:14,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:50:14,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512092968] [2022-03-15 15:50:14,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:14,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:50:14,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:50:14,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:50:14,336 INFO L87 Difference]: Start difference. First operand 93 states and 207 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:14,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:14,576 INFO L93 Difference]: Finished difference Result 125 states and 264 transitions. [2022-03-15 15:50:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:50:14,576 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:14,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:14,576 INFO L225 Difference]: With dead ends: 125 [2022-03-15 15:50:14,576 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 15:50:14,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:50:14,577 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:14,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 134 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:50:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 15:50:14,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 93. [2022-03-15 15:50:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.25) internal successors, (207), 92 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 207 transitions. [2022-03-15 15:50:14,578 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 207 transitions. Word has length 16 [2022-03-15 15:50:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:14,578 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 207 transitions. [2022-03-15 15:50:14,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:14,579 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 207 transitions. [2022-03-15 15:50:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:14,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:14,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:14,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-15 15:50:14,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:14,785 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:14,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:14,785 INFO L85 PathProgramCache]: Analyzing trace with hash -683883819, now seen corresponding path program 56 times [2022-03-15 15:50:14,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:14,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872646912] [2022-03-15 15:50:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:14,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:14,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:14,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872646912] [2022-03-15 15:50:14,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872646912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:14,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52767362] [2022-03-15 15:50:14,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:50:14,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:14,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:14,946 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) [2022-03-15 15:50:14,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 15:50:14,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:14,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:15,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:15,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:15,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:15,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 102 [2022-03-15 15:50:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:15,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:15,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:15,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 188 [2022-03-15 15:50:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:16,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52767362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:16,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:16,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:50:16,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590503167] [2022-03-15 15:50:16,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:16,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:50:16,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:16,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:50:16,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:50:16,267 INFO L87 Difference]: Start difference. First operand 93 states and 207 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:16,448 INFO L93 Difference]: Finished difference Result 120 states and 250 transitions. [2022-03-15 15:50:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:50:16,448 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:16,448 INFO L225 Difference]: With dead ends: 120 [2022-03-15 15:50:16,448 INFO L226 Difference]: Without dead ends: 113 [2022-03-15 15:50:16,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:50:16,448 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:16,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 131 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 327 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-03-15 15:50:16,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-15 15:50:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2022-03-15 15:50:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.25) internal successors, (207), 92 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 207 transitions. [2022-03-15 15:50:16,450 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 207 transitions. Word has length 16 [2022-03-15 15:50:16,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:16,450 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 207 transitions. [2022-03-15 15:50:16,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:16,450 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 207 transitions. [2022-03-15 15:50:16,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:16,450 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:16,451 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:16,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-15 15:50:16,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:16,667 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1266386825, now seen corresponding path program 57 times [2022-03-15 15:50:16,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:16,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699194758] [2022-03-15 15:50:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:16,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:50:16,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:16,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699194758] [2022-03-15 15:50:16,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699194758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:16,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606786658] [2022-03-15 15:50:16,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:50:16,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:16,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:16,723 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) [2022-03-15 15:50:16,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 15:50:16,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:50:16,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:16,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 15:50:16,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:16,863 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 72 treesize of output 56 [2022-03-15 15:50:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:50:16,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:17,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:17,004 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 49 treesize of output 45 [2022-03-15 15:50:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:50:17,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606786658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:17,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:17,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 15:50:17,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485167262] [2022-03-15 15:50:17,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:17,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:50:17,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:17,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:50:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:50:17,051 INFO L87 Difference]: Start difference. First operand 93 states and 207 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:17,098 INFO L93 Difference]: Finished difference Result 106 states and 230 transitions. [2022-03-15 15:50:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:50:17,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:17,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:17,099 INFO L225 Difference]: With dead ends: 106 [2022-03-15 15:50:17,099 INFO L226 Difference]: Without dead ends: 106 [2022-03-15 15:50:17,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:50:17,099 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:17,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 43 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:50:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-15 15:50:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 93. [2022-03-15 15:50:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.239130434782609) internal successors, (206), 92 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 206 transitions. [2022-03-15 15:50:17,101 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 206 transitions. Word has length 16 [2022-03-15 15:50:17,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:17,101 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 206 transitions. [2022-03-15 15:50:17,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:17,101 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 206 transitions. [2022-03-15 15:50:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:17,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:17,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:17,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:17,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:17,317 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1310581337, now seen corresponding path program 58 times [2022-03-15 15:50:17,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:17,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969547347] [2022-03-15 15:50:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:17,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:17,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:17,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969547347] [2022-03-15 15:50:17,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969547347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:17,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010143490] [2022-03-15 15:50:17,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:50:17,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:17,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:17,484 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) [2022-03-15 15:50:17,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 15:50:17,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:50:17,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:17,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:17,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:17,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:17,767 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 122 [2022-03-15 15:50:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:17,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:18,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:18,651 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 209 treesize of output 183 [2022-03-15 15:50:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:18,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010143490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:18,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:18,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-15 15:50:18,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580997885] [2022-03-15 15:50:18,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:18,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:50:18,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:18,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:50:18,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:50:18,940 INFO L87 Difference]: Start difference. First operand 93 states and 206 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:19,079 INFO L93 Difference]: Finished difference Result 108 states and 234 transitions. [2022-03-15 15:50:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:50:19,080 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:19,080 INFO L225 Difference]: With dead ends: 108 [2022-03-15 15:50:19,080 INFO L226 Difference]: Without dead ends: 101 [2022-03-15 15:50:19,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:50:19,080 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:19,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 85 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 292 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-03-15 15:50:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-15 15:50:19,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2022-03-15 15:50:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.230769230769231) internal successors, (203), 91 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) [2022-03-15 15:50:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 203 transitions. [2022-03-15 15:50:19,082 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 203 transitions. Word has length 16 [2022-03-15 15:50:19,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:19,082 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 203 transitions. [2022-03-15 15:50:19,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:19,082 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 203 transitions. [2022-03-15 15:50:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:19,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:19,082 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:19,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 15:50:19,298 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,SelfDestructingSolverStorable71 [2022-03-15 15:50:19,298 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:19,298 INFO L85 PathProgramCache]: Analyzing trace with hash -835589423, now seen corresponding path program 59 times [2022-03-15 15:50:19,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:19,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011149836] [2022-03-15 15:50:19,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:19,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:19,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:19,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011149836] [2022-03-15 15:50:19,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011149836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:19,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722398391] [2022-03-15 15:50:19,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:50:19,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:19,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:19,475 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) [2022-03-15 15:50:19,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 15:50:19,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:50:19,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:19,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:50:19,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:19,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:19,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 123 [2022-03-15 15:50:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:19,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:20,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:20,554 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 243 treesize of output 209 [2022-03-15 15:50:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:20,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722398391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:20,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:20,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:50:20,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969102145] [2022-03-15 15:50:20,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:20,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:50:20,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:20,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:50:20,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:50:20,797 INFO L87 Difference]: Start difference. First operand 92 states and 203 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:22,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:22,864 INFO L93 Difference]: Finished difference Result 225 states and 429 transitions. [2022-03-15 15:50:22,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:50:22,864 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:22,866 INFO L225 Difference]: With dead ends: 225 [2022-03-15 15:50:22,866 INFO L226 Difference]: Without dead ends: 185 [2022-03-15 15:50:22,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:50:22,867 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:22,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 214 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:50:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-15 15:50:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 100. [2022-03-15 15:50:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.3333333333333335) internal successors, (231), 99 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 231 transitions. [2022-03-15 15:50:22,871 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 231 transitions. Word has length 16 [2022-03-15 15:50:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:22,871 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 231 transitions. [2022-03-15 15:50:22,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 231 transitions. [2022-03-15 15:50:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:22,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:22,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:22,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:23,087 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,SelfDestructingSolverStorable72 [2022-03-15 15:50:23,087 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:23,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1352593753, now seen corresponding path program 60 times [2022-03-15 15:50:23,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:23,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968158451] [2022-03-15 15:50:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:23,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:23,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:23,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968158451] [2022-03-15 15:50:23,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968158451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:23,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967867387] [2022-03-15 15:50:23,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:50:23,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:23,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:23,226 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) [2022-03-15 15:50:23,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 15:50:23,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:50:23,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:23,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:23,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:23,495 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 127 treesize of output 101 [2022-03-15 15:50:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:23,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:24,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:24,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 188 [2022-03-15 15:50:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:24,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967867387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:24,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:24,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 15:50:24,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928959328] [2022-03-15 15:50:24,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:24,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:50:24,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:50:24,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:50:24,976 INFO L87 Difference]: Start difference. First operand 100 states and 231 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:26,124 INFO L93 Difference]: Finished difference Result 204 states and 414 transitions. [2022-03-15 15:50:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:50:26,124 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:26,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:26,125 INFO L225 Difference]: With dead ends: 204 [2022-03-15 15:50:26,125 INFO L226 Difference]: Without dead ends: 190 [2022-03-15 15:50:26,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:50:26,125 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:26,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 210 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:50:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-15 15:50:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 105. [2022-03-15 15:50:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.394230769230769) internal successors, (249), 104 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:26,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 249 transitions. [2022-03-15 15:50:26,127 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 249 transitions. Word has length 16 [2022-03-15 15:50:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:26,127 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 249 transitions. [2022-03-15 15:50:26,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:26,127 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 249 transitions. [2022-03-15 15:50:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:26,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:26,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:26,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:26,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:26,340 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash 135742331, now seen corresponding path program 61 times [2022-03-15 15:50:26,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:26,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889770096] [2022-03-15 15:50:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:26,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:26,565 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:26,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889770096] [2022-03-15 15:50:26,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889770096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:26,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416263751] [2022-03-15 15:50:26,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:50:26,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:26,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:26,567 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) [2022-03-15 15:50:26,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 15:50:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:26,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:26,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:26,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:26,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 102 [2022-03-15 15:50:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:27,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:27,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:27,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 190 [2022-03-15 15:50:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:28,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416263751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:28,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:28,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:50:28,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367879457] [2022-03-15 15:50:28,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:28,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:50:28,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:28,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:50:28,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:50:28,046 INFO L87 Difference]: Start difference. First operand 105 states and 249 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:28,529 INFO L93 Difference]: Finished difference Result 134 states and 292 transitions. [2022-03-15 15:50:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:50:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:28,530 INFO L225 Difference]: With dead ends: 134 [2022-03-15 15:50:28,530 INFO L226 Difference]: Without dead ends: 120 [2022-03-15 15:50:28,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:50:28,530 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:28,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 99 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:50:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-15 15:50:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2022-03-15 15:50:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.3773584905660377) internal successors, (252), 106 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 252 transitions. [2022-03-15 15:50:28,532 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 252 transitions. Word has length 16 [2022-03-15 15:50:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:28,532 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 252 transitions. [2022-03-15 15:50:28,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 252 transitions. [2022-03-15 15:50:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:28,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:28,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:28,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:28,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:28,733 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:28,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:28,733 INFO L85 PathProgramCache]: Analyzing trace with hash 430576711, now seen corresponding path program 62 times [2022-03-15 15:50:28,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:28,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863164406] [2022-03-15 15:50:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:28,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:28,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:28,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863164406] [2022-03-15 15:50:28,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863164406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:28,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845026023] [2022-03-15 15:50:28,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:50:28,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:28,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:28,897 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) [2022-03-15 15:50:28,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 15:50:28,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:28,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:28,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:28,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:29,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:50:29,404 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 120 [2022-03-15 15:50:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:29,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:30,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:30,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 162 [2022-03-15 15:50:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:30,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845026023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:30,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:30,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-15 15:50:30,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436780710] [2022-03-15 15:50:30,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:30,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:50:30,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:30,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:50:30,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:50:30,538 INFO L87 Difference]: Start difference. First operand 107 states and 252 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:30,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:30,836 INFO L93 Difference]: Finished difference Result 132 states and 300 transitions. [2022-03-15 15:50:30,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:50:30,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:30,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:30,836 INFO L225 Difference]: With dead ends: 132 [2022-03-15 15:50:30,836 INFO L226 Difference]: Without dead ends: 125 [2022-03-15 15:50:30,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:50:30,837 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:30,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 118 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 402 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-03-15 15:50:30,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-15 15:50:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 108. [2022-03-15 15:50:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.383177570093458) internal successors, (255), 107 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 255 transitions. [2022-03-15 15:50:30,839 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 255 transitions. Word has length 16 [2022-03-15 15:50:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:30,839 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 255 transitions. [2022-03-15 15:50:30,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 255 transitions. [2022-03-15 15:50:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:30,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:30,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:30,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:31,039 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,SelfDestructingSolverStorable75 [2022-03-15 15:50:31,039 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:31,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:31,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2129454403, now seen corresponding path program 63 times [2022-03-15 15:50:31,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:31,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413799519] [2022-03-15 15:50:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:31,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:31,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:31,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413799519] [2022-03-15 15:50:31,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413799519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:31,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921297774] [2022-03-15 15:50:31,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:50:31,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:31,227 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) [2022-03-15 15:50:31,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 15:50:31,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:50:31,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:31,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:31,511 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 130 treesize of output 104 [2022-03-15 15:50:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:31,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:32,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:32,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 177 [2022-03-15 15:50:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:32,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921297774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:32,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:32,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:50:32,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131149311] [2022-03-15 15:50:32,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:32,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:50:32,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:32,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:50:32,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:50:32,660 INFO L87 Difference]: Start difference. First operand 108 states and 255 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:33,305 INFO L93 Difference]: Finished difference Result 138 states and 310 transitions. [2022-03-15 15:50:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:50:33,306 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:33,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:33,306 INFO L225 Difference]: With dead ends: 138 [2022-03-15 15:50:33,306 INFO L226 Difference]: Without dead ends: 131 [2022-03-15 15:50:33,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:33,307 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:33,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 119 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:50:33,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-15 15:50:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 109. [2022-03-15 15:50:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.388888888888889) internal successors, (258), 108 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:33,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 258 transitions. [2022-03-15 15:50:33,309 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 258 transitions. Word has length 16 [2022-03-15 15:50:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:33,309 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 258 transitions. [2022-03-15 15:50:33,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 258 transitions. [2022-03-15 15:50:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:33,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:33,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:33,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 15:50:33,509 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,SelfDestructingSolverStorable76 [2022-03-15 15:50:33,510 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:33,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:33,510 INFO L85 PathProgramCache]: Analyzing trace with hash -171047737, now seen corresponding path program 64 times [2022-03-15 15:50:33,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:33,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142522033] [2022-03-15 15:50:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:33,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:33,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:33,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142522033] [2022-03-15 15:50:33,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142522033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:33,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808084857] [2022-03-15 15:50:33,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:50:33,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:33,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:33,718 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) [2022-03-15 15:50:33,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 15:50:33,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:50:33,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:33,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:33,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:33,951 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 143 treesize of output 113 [2022-03-15 15:50:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:34,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:34,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:34,714 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 231 treesize of output 189 [2022-03-15 15:50:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:35,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808084857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:35,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:35,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:50:35,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963779930] [2022-03-15 15:50:35,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:35,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:50:35,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:50:35,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:50:35,021 INFO L87 Difference]: Start difference. First operand 109 states and 258 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:35,432 INFO L93 Difference]: Finished difference Result 141 states and 315 transitions. [2022-03-15 15:50:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:50:35,432 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:35,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:35,432 INFO L225 Difference]: With dead ends: 141 [2022-03-15 15:50:35,432 INFO L226 Difference]: Without dead ends: 134 [2022-03-15 15:50:35,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:50:35,433 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:35,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 108 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:50:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-15 15:50:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 107. [2022-03-15 15:50:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.3773584905660377) internal successors, (252), 106 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 252 transitions. [2022-03-15 15:50:35,435 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 252 transitions. Word has length 16 [2022-03-15 15:50:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:35,435 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 252 transitions. [2022-03-15 15:50:35,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 252 transitions. [2022-03-15 15:50:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:35,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:35,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:35,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:35,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:35,654 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:35,654 INFO L85 PathProgramCache]: Analyzing trace with hash 22670283, now seen corresponding path program 65 times [2022-03-15 15:50:35,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:35,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730872114] [2022-03-15 15:50:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:35,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:35,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:35,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730872114] [2022-03-15 15:50:35,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730872114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:35,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175364861] [2022-03-15 15:50:35,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:50:35,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:35,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:35,837 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) [2022-03-15 15:50:35,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 15:50:35,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:35,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:35,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:35,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:36,142 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 111 treesize of output 87 [2022-03-15 15:50:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:36,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:36,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:36,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 154 [2022-03-15 15:50:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:36,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175364861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:36,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:36,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-15 15:50:36,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591873678] [2022-03-15 15:50:36,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:36,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:50:36,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:50:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:50:36,858 INFO L87 Difference]: Start difference. First operand 107 states and 252 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:37,251 INFO L93 Difference]: Finished difference Result 125 states and 283 transitions. [2022-03-15 15:50:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:50:37,251 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:37,251 INFO L225 Difference]: With dead ends: 125 [2022-03-15 15:50:37,251 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 15:50:37,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:37,252 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:37,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 107 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:50:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 15:50:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2022-03-15 15:50:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3796296296296298) internal successors, (257), 108 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 257 transitions. [2022-03-15 15:50:37,254 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 257 transitions. Word has length 16 [2022-03-15 15:50:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:37,254 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 257 transitions. [2022-03-15 15:50:37,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 257 transitions. [2022-03-15 15:50:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:37,254 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:37,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:37,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 15:50:37,454 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,SelfDestructingSolverStorable78 [2022-03-15 15:50:37,455 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2017135439, now seen corresponding path program 66 times [2022-03-15 15:50:37,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:37,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657381205] [2022-03-15 15:50:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:37,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:37,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:37,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657381205] [2022-03-15 15:50:37,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657381205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:37,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125119965] [2022-03-15 15:50:37,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:50:37,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:37,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:37,639 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) [2022-03-15 15:50:37,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 15:50:37,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:50:37,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:37,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:37,970 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 160 treesize of output 124 [2022-03-15 15:50:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:38,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:38,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:38,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 201 treesize of output 175 [2022-03-15 15:50:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:39,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125119965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:39,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:39,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-15 15:50:39,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575366115] [2022-03-15 15:50:39,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:39,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:50:39,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:39,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:50:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:50:39,462 INFO L87 Difference]: Start difference. First operand 109 states and 257 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:39,993 INFO L93 Difference]: Finished difference Result 143 states and 315 transitions. [2022-03-15 15:50:39,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:50:39,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:39,993 INFO L225 Difference]: With dead ends: 143 [2022-03-15 15:50:39,993 INFO L226 Difference]: Without dead ends: 136 [2022-03-15 15:50:39,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:50:39,994 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:39,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 185 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:50:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-15 15:50:39,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 108. [2022-03-15 15:50:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.3738317757009346) internal successors, (254), 107 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 254 transitions. [2022-03-15 15:50:39,996 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 254 transitions. Word has length 16 [2022-03-15 15:50:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:39,996 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 254 transitions. [2022-03-15 15:50:39,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 254 transitions. [2022-03-15 15:50:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:39,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:39,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:40,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:40,196 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,SelfDestructingSolverStorable79 [2022-03-15 15:50:40,197 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:40,197 INFO L85 PathProgramCache]: Analyzing trace with hash -129035321, now seen corresponding path program 67 times [2022-03-15 15:50:40,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:40,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833298329] [2022-03-15 15:50:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:40,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:40,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:40,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833298329] [2022-03-15 15:50:40,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833298329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:40,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368948562] [2022-03-15 15:50:40,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:50:40,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:40,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:40,346 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) [2022-03-15 15:50:40,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 15:50:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:40,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:40,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:40,550 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 154 treesize of output 122 [2022-03-15 15:50:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:40,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:41,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:41,265 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 230 treesize of output 198 [2022-03-15 15:50:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:41,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368948562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:41,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:41,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:50:41,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972174867] [2022-03-15 15:50:41,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:41,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:50:41,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:50:41,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:50:41,491 INFO L87 Difference]: Start difference. First operand 108 states and 254 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:41,674 INFO L93 Difference]: Finished difference Result 127 states and 290 transitions. [2022-03-15 15:50:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:50:41,674 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:41,675 INFO L225 Difference]: With dead ends: 127 [2022-03-15 15:50:41,675 INFO L226 Difference]: Without dead ends: 120 [2022-03-15 15:50:41,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:50:41,675 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:41,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 91 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:50:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-15 15:50:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2022-03-15 15:50:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.3738317757009346) internal successors, (254), 107 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 254 transitions. [2022-03-15 15:50:41,677 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 254 transitions. Word has length 16 [2022-03-15 15:50:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:41,677 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 254 transitions. [2022-03-15 15:50:41,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:41,678 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 254 transitions. [2022-03-15 15:50:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:41,678 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:41,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:41,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:41,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:41,894 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash -863127997, now seen corresponding path program 68 times [2022-03-15 15:50:41,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:41,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260974813] [2022-03-15 15:50:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:41,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:42,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:42,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260974813] [2022-03-15 15:50:42,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260974813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:42,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866257373] [2022-03-15 15:50:42,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:50:42,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:42,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:42,075 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) [2022-03-15 15:50:42,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 15:50:42,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:42,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:42,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:42,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:42,339 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 154 treesize of output 122 [2022-03-15 15:50:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:42,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:43,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:43,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 239 treesize of output 203 [2022-03-15 15:50:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:43,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866257373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:43,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:43,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:50:43,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168895416] [2022-03-15 15:50:43,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:43,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:50:43,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:43,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:50:43,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:50:43,552 INFO L87 Difference]: Start difference. First operand 108 states and 254 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:43,789 INFO L93 Difference]: Finished difference Result 151 states and 324 transitions. [2022-03-15 15:50:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:50:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:43,789 INFO L225 Difference]: With dead ends: 151 [2022-03-15 15:50:43,789 INFO L226 Difference]: Without dead ends: 144 [2022-03-15 15:50:43,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:50:43,790 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:43,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 136 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:50:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-15 15:50:43,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 109. [2022-03-15 15:50:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3796296296296298) internal successors, (257), 108 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 257 transitions. [2022-03-15 15:50:43,792 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 257 transitions. Word has length 16 [2022-03-15 15:50:43,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:43,792 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 257 transitions. [2022-03-15 15:50:43,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:43,792 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 257 transitions. [2022-03-15 15:50:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:43,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:43,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:43,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:44,007 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,SelfDestructingSolverStorable81 [2022-03-15 15:50:44,007 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:44,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1131337159, now seen corresponding path program 69 times [2022-03-15 15:50:44,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:44,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662477212] [2022-03-15 15:50:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:44,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:44,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:44,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662477212] [2022-03-15 15:50:44,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662477212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:44,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610408513] [2022-03-15 15:50:44,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:50:44,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:44,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:44,238 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) [2022-03-15 15:50:44,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 15:50:44,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:50:44,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:44,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:44,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:44,489 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 152 treesize of output 120 [2022-03-15 15:50:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:44,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:45,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:45,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 186 [2022-03-15 15:50:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:45,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610408513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:45,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:45,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:50:45,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381720485] [2022-03-15 15:50:45,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:45,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:50:45,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:50:45,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:50:45,635 INFO L87 Difference]: Start difference. First operand 109 states and 257 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:45,931 INFO L93 Difference]: Finished difference Result 142 states and 312 transitions. [2022-03-15 15:50:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:50:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:45,931 INFO L225 Difference]: With dead ends: 142 [2022-03-15 15:50:45,931 INFO L226 Difference]: Without dead ends: 135 [2022-03-15 15:50:45,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:50:45,932 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:45,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 120 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:50:45,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-15 15:50:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 109. [2022-03-15 15:50:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3796296296296298) internal successors, (257), 108 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 257 transitions. [2022-03-15 15:50:45,933 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 257 transitions. Word has length 16 [2022-03-15 15:50:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:45,933 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 257 transitions. [2022-03-15 15:50:45,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 257 transitions. [2022-03-15 15:50:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:45,934 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:45,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:45,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-15 15:50:46,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:46,134 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:46,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:46,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1014833601, now seen corresponding path program 70 times [2022-03-15 15:50:46,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:46,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811657750] [2022-03-15 15:50:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:46,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:46,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:46,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811657750] [2022-03-15 15:50:46,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811657750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:46,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050770166] [2022-03-15 15:50:46,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:50:46,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:46,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:46,323 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) [2022-03-15 15:50:46,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 15:50:46,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:50:46,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:46,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:46,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:46,552 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 131 treesize of output 105 [2022-03-15 15:50:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:46,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:47,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:47,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 154 [2022-03-15 15:50:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:47,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050770166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:47,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:47,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:50:47,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786114253] [2022-03-15 15:50:47,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:47,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:50:47,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:50:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:50:47,899 INFO L87 Difference]: Start difference. First operand 109 states and 257 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:48,481 INFO L93 Difference]: Finished difference Result 145 states and 320 transitions. [2022-03-15 15:50:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:50:48,481 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:48,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:48,482 INFO L225 Difference]: With dead ends: 145 [2022-03-15 15:50:48,482 INFO L226 Difference]: Without dead ends: 138 [2022-03-15 15:50:48,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:48,482 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:48,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 178 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:50:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-15 15:50:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 109. [2022-03-15 15:50:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3796296296296298) internal successors, (257), 108 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 257 transitions. [2022-03-15 15:50:48,484 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 257 transitions. Word has length 16 [2022-03-15 15:50:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:48,484 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 257 transitions. [2022-03-15 15:50:48,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 257 transitions. [2022-03-15 15:50:48,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:48,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:48,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:48,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:48,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:48,685 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1173349575, now seen corresponding path program 71 times [2022-03-15 15:50:48,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:48,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088147257] [2022-03-15 15:50:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:48,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:48,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088147257] [2022-03-15 15:50:48,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088147257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:48,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117352368] [2022-03-15 15:50:48,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:50:48,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:48,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:48,927 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) [2022-03-15 15:50:48,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 15:50:48,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:50:48,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:48,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:50:48,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:49,281 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 148 treesize of output 118 [2022-03-15 15:50:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:49,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:50,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:50,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 185 [2022-03-15 15:50:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:50,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117352368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:50,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:50,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-15 15:50:50,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521069979] [2022-03-15 15:50:50,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:50,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:50:50,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:50,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:50:50,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:50:50,726 INFO L87 Difference]: Start difference. First operand 109 states and 257 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:53,726 INFO L93 Difference]: Finished difference Result 286 states and 572 transitions. [2022-03-15 15:50:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 15:50:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:53,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:53,727 INFO L225 Difference]: With dead ends: 286 [2022-03-15 15:50:53,727 INFO L226 Difference]: Without dead ends: 253 [2022-03-15 15:50:53,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:50:53,727 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 116 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:53,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 311 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:50:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-15 15:50:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 121. [2022-03-15 15:50:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.4833333333333334) internal successors, (298), 120 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 298 transitions. [2022-03-15 15:50:53,730 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 298 transitions. Word has length 16 [2022-03-15 15:50:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:53,730 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 298 transitions. [2022-03-15 15:50:53,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 298 transitions. [2022-03-15 15:50:53,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:53,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:53,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:53,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:53,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:53,943 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:53,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:53,943 INFO L85 PathProgramCache]: Analyzing trace with hash 896924943, now seen corresponding path program 72 times [2022-03-15 15:50:53,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:53,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010580909] [2022-03-15 15:50:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:53,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:54,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:54,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010580909] [2022-03-15 15:50:54,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010580909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:54,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854813107] [2022-03-15 15:50:54,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:50:54,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:54,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:54,198 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) [2022-03-15 15:50:54,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 15:50:54,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:50:54,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:54,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:50:54,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:54,528 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 134 treesize of output 106 [2022-03-15 15:50:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:54,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:55,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:55,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 194 [2022-03-15 15:50:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:55,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854813107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:55,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:55,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:50:55,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051385576] [2022-03-15 15:50:55,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:55,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:50:55,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:50:55,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:50:55,553 INFO L87 Difference]: Start difference. First operand 121 states and 298 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:56,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:56,260 INFO L93 Difference]: Finished difference Result 222 states and 476 transitions. [2022-03-15 15:50:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:50:56,260 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:56,261 INFO L225 Difference]: With dead ends: 222 [2022-03-15 15:50:56,261 INFO L226 Difference]: Without dead ends: 202 [2022-03-15 15:50:56,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:50:56,261 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 88 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:56,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 321 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:50:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-15 15:50:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 127. [2022-03-15 15:50:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.5238095238095237) internal successors, (318), 126 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 318 transitions. [2022-03-15 15:50:56,264 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 318 transitions. Word has length 16 [2022-03-15 15:50:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:56,264 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 318 transitions. [2022-03-15 15:50:56,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 318 transitions. [2022-03-15 15:50:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:56,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:56,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:56,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 15:50:56,474 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,SelfDestructingSolverStorable85 [2022-03-15 15:50:56,474 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:56,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:56,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1403577197, now seen corresponding path program 73 times [2022-03-15 15:50:56,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:56,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645573399] [2022-03-15 15:50:56,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:56,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:56,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:56,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645573399] [2022-03-15 15:50:56,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645573399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:56,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626079584] [2022-03-15 15:50:56,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:50:56,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:56,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:56,712 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) [2022-03-15 15:50:56,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 15:50:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:56,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:56,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:56,885 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 128 treesize of output 102 [2022-03-15 15:50:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:56,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:57,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:57,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 207 treesize of output 179 [2022-03-15 15:50:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:57,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626079584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:50:57,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:50:57,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:50:57,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587304442] [2022-03-15 15:50:57,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:50:57,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:50:57,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:50:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:50:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:50:57,859 INFO L87 Difference]: Start difference. First operand 127 states and 318 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:50:58,345 INFO L93 Difference]: Finished difference Result 175 states and 395 transitions. [2022-03-15 15:50:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:50:58,346 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:50:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:50:58,346 INFO L225 Difference]: With dead ends: 175 [2022-03-15 15:50:58,346 INFO L226 Difference]: Without dead ends: 168 [2022-03-15 15:50:58,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:50:58,347 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:50:58,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 190 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:50:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-15 15:50:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 127. [2022-03-15 15:50:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.5238095238095237) internal successors, (318), 126 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 318 transitions. [2022-03-15 15:50:58,349 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 318 transitions. Word has length 16 [2022-03-15 15:50:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:50:58,349 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 318 transitions. [2022-03-15 15:50:58,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:50:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 318 transitions. [2022-03-15 15:50:58,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:50:58,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:50:58,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:50:58,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 15:50:58,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:58,550 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:50:58,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:50:58,550 INFO L85 PathProgramCache]: Analyzing trace with hash 745219339, now seen corresponding path program 74 times [2022-03-15 15:50:58,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:50:58,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054329935] [2022-03-15 15:50:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:50:58,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:50:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:50:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:58,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:50:58,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054329935] [2022-03-15 15:50:58,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054329935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:50:58,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548473025] [2022-03-15 15:50:58,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:50:58,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:50:58,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:50:58,760 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) [2022-03-15 15:50:58,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 15:50:58,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:50:58,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:50:58,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:50:58,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:50:59,012 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 128 treesize of output 102 [2022-03-15 15:50:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:50:59,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:50:59,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:50:59,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 154 [2022-03-15 15:51:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:00,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548473025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:00,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:00,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:51:00,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402879517] [2022-03-15 15:51:00,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:00,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:51:00,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:00,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:51:00,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:51:00,175 INFO L87 Difference]: Start difference. First operand 127 states and 318 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:00,546 INFO L93 Difference]: Finished difference Result 178 states and 401 transitions. [2022-03-15 15:51:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:51:00,546 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:51:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:00,546 INFO L225 Difference]: With dead ends: 178 [2022-03-15 15:51:00,547 INFO L226 Difference]: Without dead ends: 171 [2022-03-15 15:51:00,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:51:00,547 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:00,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 226 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:51:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-15 15:51:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2022-03-15 15:51:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.5354330708661417) internal successors, (322), 127 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 322 transitions. [2022-03-15 15:51:00,549 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 322 transitions. Word has length 16 [2022-03-15 15:51:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:00,549 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 322 transitions. [2022-03-15 15:51:00,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 322 transitions. [2022-03-15 15:51:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:51:00,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:00,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:00,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:00,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:00,765 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:00,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1361564781, now seen corresponding path program 75 times [2022-03-15 15:51:00,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:00,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287435813] [2022-03-15 15:51:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:00,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:00,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:00,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287435813] [2022-03-15 15:51:00,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287435813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:00,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821986960] [2022-03-15 15:51:00,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:00,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:00,988 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) [2022-03-15 15:51:00,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 15:51:01,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:51:01,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:01,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:51:01,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:01,242 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 181 treesize of output 141 [2022-03-15 15:51:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:01,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:02,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:02,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 255 treesize of output 213 [2022-03-15 15:51:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:02,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821986960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:02,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:02,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:51:02,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728913275] [2022-03-15 15:51:02,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:02,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:51:02,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:51:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:51:02,732 INFO L87 Difference]: Start difference. First operand 128 states and 322 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:07,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:07,208 INFO L93 Difference]: Finished difference Result 301 states and 603 transitions. [2022-03-15 15:51:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 15:51:07,212 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:51:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:07,213 INFO L225 Difference]: With dead ends: 301 [2022-03-15 15:51:07,213 INFO L226 Difference]: Without dead ends: 268 [2022-03-15 15:51:07,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=419, Invalid=2551, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 15:51:07,214 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 154 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:07,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 279 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:51:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-15 15:51:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 128. [2022-03-15 15:51:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.5354330708661417) internal successors, (322), 127 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:07,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 322 transitions. [2022-03-15 15:51:07,216 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 322 transitions. Word has length 16 [2022-03-15 15:51:07,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:07,216 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 322 transitions. [2022-03-15 15:51:07,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 322 transitions. [2022-03-15 15:51:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 15:51:07,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:07,217 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:07,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:07,424 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,SelfDestructingSolverStorable88 [2022-03-15 15:51:07,424 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:07,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1604705095, now seen corresponding path program 76 times [2022-03-15 15:51:07,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:07,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979349197] [2022-03-15 15:51:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:07,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:07,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:07,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979349197] [2022-03-15 15:51:07,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979349197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:07,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842528023] [2022-03-15 15:51:07,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:07,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:07,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:07,676 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) [2022-03-15 15:51:07,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 15:51:07,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:07,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:07,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 15:51:07,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:07,962 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 152 treesize of output 120 [2022-03-15 15:51:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:08,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:09,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:09,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 145 [2022-03-15 15:51:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:09,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842528023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:09,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:09,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-15 15:51:09,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598220016] [2022-03-15 15:51:09,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:09,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:51:09,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:09,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:51:09,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:51:09,361 INFO L87 Difference]: Start difference. First operand 128 states and 322 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:10,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:10,629 INFO L93 Difference]: Finished difference Result 204 states and 464 transitions. [2022-03-15 15:51:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:51:10,629 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 15:51:10,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:10,630 INFO L225 Difference]: With dead ends: 204 [2022-03-15 15:51:10,630 INFO L226 Difference]: Without dead ends: 197 [2022-03-15 15:51:10,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:51:10,630 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 122 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:10,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 183 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:51:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-15 15:51:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 132. [2022-03-15 15:51:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5267175572519083) internal successors, (331), 131 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 331 transitions. [2022-03-15 15:51:10,632 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 331 transitions. Word has length 16 [2022-03-15 15:51:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:10,632 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 331 transitions. [2022-03-15 15:51:10,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 331 transitions. [2022-03-15 15:51:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:10,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:10,633 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:10,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:10,835 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,SelfDestructingSolverStorable89 [2022-03-15 15:51:10,835 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:10,835 INFO L85 PathProgramCache]: Analyzing trace with hash 169569595, now seen corresponding path program 77 times [2022-03-15 15:51:10,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:10,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193586783] [2022-03-15 15:51:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:10,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:10,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:10,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193586783] [2022-03-15 15:51:10,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193586783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:10,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343248654] [2022-03-15 15:51:10,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:10,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:10,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:10,901 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) [2022-03-15 15:51:10,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 15:51:11,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:51:11,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:11,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:11,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:11,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:11,205 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:11,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-03-15 15:51:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:11,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343248654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:11,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:11,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-03-15 15:51:11,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953066088] [2022-03-15 15:51:11,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:11,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:51:11,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:11,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:51:11,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:51:11,213 INFO L87 Difference]: Start difference. First operand 132 states and 331 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:11,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:11,316 INFO L93 Difference]: Finished difference Result 185 states and 436 transitions. [2022-03-15 15:51:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:11,316 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:11,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:11,317 INFO L225 Difference]: With dead ends: 185 [2022-03-15 15:51:11,317 INFO L226 Difference]: Without dead ends: 185 [2022-03-15 15:51:11,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:51:11,317 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:11,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 92 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-15 15:51:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 126. [2022-03-15 15:51:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.56) internal successors, (320), 125 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) [2022-03-15 15:51:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 320 transitions. [2022-03-15 15:51:11,319 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 320 transitions. Word has length 17 [2022-03-15 15:51:11,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:11,319 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 320 transitions. [2022-03-15 15:51:11,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:11,320 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 320 transitions. [2022-03-15 15:51:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:11,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:11,320 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:11,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:11,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:11,536 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:11,536 INFO L85 PathProgramCache]: Analyzing trace with hash 495794473, now seen corresponding path program 78 times [2022-03-15 15:51:11,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:11,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471448555] [2022-03-15 15:51:11,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:11,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:11,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:11,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471448555] [2022-03-15 15:51:11,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471448555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:11,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992753632] [2022-03-15 15:51:11,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:11,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:11,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:11,621 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) [2022-03-15 15:51:11,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 15:51:11,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:51:11,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:11,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:11,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:11,844 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 54 treesize of output 42 [2022-03-15 15:51:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:11,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:11,952 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:11,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:51:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:11,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992753632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:11,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:11,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:11,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216996674] [2022-03-15 15:51:11,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:11,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:11,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:11,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:11,974 INFO L87 Difference]: Start difference. First operand 126 states and 320 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2022-03-15 15:51:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:12,136 INFO L93 Difference]: Finished difference Result 171 states and 406 transitions. [2022-03-15 15:51:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:12,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:12,137 INFO L225 Difference]: With dead ends: 171 [2022-03-15 15:51:12,137 INFO L226 Difference]: Without dead ends: 162 [2022-03-15 15:51:12,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:12,138 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:12,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 92 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-15 15:51:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2022-03-15 15:51:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.56) internal successors, (320), 125 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) [2022-03-15 15:51:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 320 transitions. [2022-03-15 15:51:12,141 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 320 transitions. Word has length 17 [2022-03-15 15:51:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:12,141 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 320 transitions. [2022-03-15 15:51:12,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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) [2022-03-15 15:51:12,141 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 320 transitions. [2022-03-15 15:51:12,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:12,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:12,141 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:12,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:12,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:12,358 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash 219266217, now seen corresponding path program 79 times [2022-03-15 15:51:12,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:12,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504216790] [2022-03-15 15:51:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:12,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:12,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:12,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504216790] [2022-03-15 15:51:12,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504216790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:12,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177073058] [2022-03-15 15:51:12,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:12,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:12,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:12,443 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) [2022-03-15 15:51:12,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 15:51:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:12,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:12,734 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:12,735 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 24 treesize of output 19 [2022-03-15 15:51:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:12,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177073058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:12,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:12,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-15 15:51:12,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579394276] [2022-03-15 15:51:12,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:12,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:51:12,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:12,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:51:12,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:51:12,741 INFO L87 Difference]: Start difference. First operand 126 states and 320 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:12,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:12,824 INFO L93 Difference]: Finished difference Result 158 states and 381 transitions. [2022-03-15 15:51:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:12,825 INFO L225 Difference]: With dead ends: 158 [2022-03-15 15:51:12,825 INFO L226 Difference]: Without dead ends: 158 [2022-03-15 15:51:12,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:51:12,825 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:12,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 74 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:12,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-15 15:51:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 127. [2022-03-15 15:51:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.5555555555555554) internal successors, (322), 126 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 322 transitions. [2022-03-15 15:51:12,828 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 322 transitions. Word has length 17 [2022-03-15 15:51:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:12,828 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 322 transitions. [2022-03-15 15:51:12,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:12,828 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 322 transitions. [2022-03-15 15:51:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:12,829 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:12,829 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:12,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 15:51:13,043 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,SelfDestructingSolverStorable92 [2022-03-15 15:51:13,043 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:13,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1621395373, now seen corresponding path program 80 times [2022-03-15 15:51:13,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:13,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538165683] [2022-03-15 15:51:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:13,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:13,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:13,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538165683] [2022-03-15 15:51:13,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538165683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:13,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774087885] [2022-03-15 15:51:13,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:13,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:13,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:13,152 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) [2022-03-15 15:51:13,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 15:51:13,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:13,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:13,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:13,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:13,401 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 54 treesize of output 42 [2022-03-15 15:51:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:13,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:13,538 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:13,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:51:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:13,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774087885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:13,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:13,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:13,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304252297] [2022-03-15 15:51:13,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:13,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:13,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:13,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:13,561 INFO L87 Difference]: Start difference. First operand 127 states and 322 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:13,729 INFO L93 Difference]: Finished difference Result 169 states and 403 transitions. [2022-03-15 15:51:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:13,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:13,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:13,730 INFO L225 Difference]: With dead ends: 169 [2022-03-15 15:51:13,730 INFO L226 Difference]: Without dead ends: 163 [2022-03-15 15:51:13,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:13,730 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:13,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 107 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-15 15:51:13,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 128. [2022-03-15 15:51:13,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.5511811023622046) internal successors, (324), 127 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) [2022-03-15 15:51:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 324 transitions. [2022-03-15 15:51:13,733 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 324 transitions. Word has length 17 [2022-03-15 15:51:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:13,733 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 324 transitions. [2022-03-15 15:51:13,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 324 transitions. [2022-03-15 15:51:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:13,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:13,733 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:13,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 15:51:13,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:13,935 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:13,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash -188640211, now seen corresponding path program 81 times [2022-03-15 15:51:13,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:13,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980025637] [2022-03-15 15:51:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:13,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:14,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:14,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980025637] [2022-03-15 15:51:14,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980025637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:14,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291688316] [2022-03-15 15:51:14,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:14,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:14,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:14,017 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) [2022-03-15 15:51:14,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 15:51:14,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:51:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:14,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:14,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:14,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:14,278 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:14,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-15 15:51:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:14,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291688316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:14,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:14,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-15 15:51:14,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125455169] [2022-03-15 15:51:14,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:14,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 15:51:14,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:14,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 15:51:14,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:51:14,284 INFO L87 Difference]: Start difference. First operand 128 states and 324 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:14,401 INFO L93 Difference]: Finished difference Result 155 states and 375 transitions. [2022-03-15 15:51:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:14,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:14,402 INFO L225 Difference]: With dead ends: 155 [2022-03-15 15:51:14,402 INFO L226 Difference]: Without dead ends: 155 [2022-03-15 15:51:14,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:51:14,403 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:14,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 83 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:14,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-15 15:51:14,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 128. [2022-03-15 15:51:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.5511811023622046) internal successors, (324), 127 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) [2022-03-15 15:51:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 324 transitions. [2022-03-15 15:51:14,405 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 324 transitions. Word has length 17 [2022-03-15 15:51:14,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:14,405 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 324 transitions. [2022-03-15 15:51:14,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:14,405 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 324 transitions. [2022-03-15 15:51:14,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:14,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:14,405 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:14,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:14,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:14,607 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:14,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:14,608 INFO L85 PathProgramCache]: Analyzing trace with hash -974694231, now seen corresponding path program 82 times [2022-03-15 15:51:14,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:14,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646666087] [2022-03-15 15:51:14,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:14,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:14,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:14,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646666087] [2022-03-15 15:51:14,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646666087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:14,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834605997] [2022-03-15 15:51:14,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:14,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:14,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:14,690 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) [2022-03-15 15:51:14,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 15:51:14,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:14,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:14,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:14,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:14,858 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 75 treesize of output 59 [2022-03-15 15:51:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:14,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:14,963 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:14,963 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 49 treesize of output 40 [2022-03-15 15:51:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:14,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834605997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:14,976 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:14,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:14,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604079265] [2022-03-15 15:51:14,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:14,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:14,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:14,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:14,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:14,979 INFO L87 Difference]: Start difference. First operand 128 states and 324 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:15,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:15,148 INFO L93 Difference]: Finished difference Result 184 states and 428 transitions. [2022-03-15 15:51:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:15,149 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:15,149 INFO L225 Difference]: With dead ends: 184 [2022-03-15 15:51:15,149 INFO L226 Difference]: Without dead ends: 181 [2022-03-15 15:51:15,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:51:15,150 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:15,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 112 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:15,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-15 15:51:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 133. [2022-03-15 15:51:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.5454545454545454) internal successors, (336), 132 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:15,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 336 transitions. [2022-03-15 15:51:15,157 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 336 transitions. Word has length 17 [2022-03-15 15:51:15,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:15,157 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 336 transitions. [2022-03-15 15:51:15,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:15,157 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 336 transitions. [2022-03-15 15:51:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:15,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:15,158 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:15,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-15 15:51:15,358 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,SelfDestructingSolverStorable95 [2022-03-15 15:51:15,358 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:15,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:15,358 INFO L85 PathProgramCache]: Analyzing trace with hash -340345815, now seen corresponding path program 83 times [2022-03-15 15:51:15,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:15,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762178460] [2022-03-15 15:51:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:15,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:15,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:15,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762178460] [2022-03-15 15:51:15,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762178460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:15,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307845579] [2022-03-15 15:51:15,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:15,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:15,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:15,411 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) [2022-03-15 15:51:15,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 15:51:15,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:51:15,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:15,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:15,548 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 54 treesize of output 42 [2022-03-15 15:51:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:15,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:15,692 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:15,692 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 19 [2022-03-15 15:51:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:15,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307845579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:15,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:15,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-15 15:51:15,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939915841] [2022-03-15 15:51:15,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:15,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:51:15,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:15,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:51:15,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:51:15,698 INFO L87 Difference]: Start difference. First operand 133 states and 336 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:15,846 INFO L93 Difference]: Finished difference Result 158 states and 380 transitions. [2022-03-15 15:51:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:51:15,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:15,847 INFO L225 Difference]: With dead ends: 158 [2022-03-15 15:51:15,847 INFO L226 Difference]: Without dead ends: 156 [2022-03-15 15:51:15,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:15,847 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:15,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 91 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:15,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-15 15:51:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 133. [2022-03-15 15:51:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.537878787878788) internal successors, (335), 132 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 335 transitions. [2022-03-15 15:51:15,849 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 335 transitions. Word has length 17 [2022-03-15 15:51:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:15,849 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 335 transitions. [2022-03-15 15:51:15,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 335 transitions. [2022-03-15 15:51:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:15,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:15,850 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:15,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-15 15:51:16,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:16,050 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1019770925, now seen corresponding path program 84 times [2022-03-15 15:51:16,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:16,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498031620] [2022-03-15 15:51:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:16,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:16,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:16,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498031620] [2022-03-15 15:51:16,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498031620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:16,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955313506] [2022-03-15 15:51:16,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:16,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:16,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:16,179 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) [2022-03-15 15:51:16,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 15:51:16,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:51:16,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:16,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:16,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:16,428 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 75 treesize of output 59 [2022-03-15 15:51:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:16,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:16,623 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:16,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:51:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:16,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955313506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:16,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:16,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:16,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452392852] [2022-03-15 15:51:16,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:16,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:16,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:16,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:16,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:16,641 INFO L87 Difference]: Start difference. First operand 133 states and 335 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:16,793 INFO L93 Difference]: Finished difference Result 167 states and 403 transitions. [2022-03-15 15:51:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:16,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:16,794 INFO L225 Difference]: With dead ends: 167 [2022-03-15 15:51:16,794 INFO L226 Difference]: Without dead ends: 167 [2022-03-15 15:51:16,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:16,794 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:16,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 97 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-15 15:51:16,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2022-03-15 15:51:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.546875) internal successors, (326), 128 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 326 transitions. [2022-03-15 15:51:16,796 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 326 transitions. Word has length 17 [2022-03-15 15:51:16,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:16,797 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 326 transitions. [2022-03-15 15:51:16,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:16,797 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 326 transitions. [2022-03-15 15:51:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:16,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:16,797 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:16,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:16,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:16,997 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:16,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:16,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1759861499, now seen corresponding path program 85 times [2022-03-15 15:51:16,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:16,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970809371] [2022-03-15 15:51:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:16,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:17,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:17,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970809371] [2022-03-15 15:51:17,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970809371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:17,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159944821] [2022-03-15 15:51:17,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:17,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:17,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:17,078 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) [2022-03-15 15:51:17,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 15:51:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:17,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:17,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:17,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:17,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:17,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:17,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159944821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:17,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:17,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-15 15:51:17,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683467149] [2022-03-15 15:51:17,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:17,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:51:17,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:51:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:51:17,392 INFO L87 Difference]: Start difference. First operand 129 states and 326 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:17,501 INFO L93 Difference]: Finished difference Result 146 states and 359 transitions. [2022-03-15 15:51:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:17,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:17,502 INFO L225 Difference]: With dead ends: 146 [2022-03-15 15:51:17,502 INFO L226 Difference]: Without dead ends: 146 [2022-03-15 15:51:17,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:51:17,502 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:17,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 82 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-15 15:51:17,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 129. [2022-03-15 15:51:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.546875) internal successors, (326), 128 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 326 transitions. [2022-03-15 15:51:17,504 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 326 transitions. Word has length 17 [2022-03-15 15:51:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:17,504 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 326 transitions. [2022-03-15 15:51:17,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 326 transitions. [2022-03-15 15:51:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:17,505 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:17,505 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:17,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 15:51:17,705 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,SelfDestructingSolverStorable98 [2022-03-15 15:51:17,705 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:17,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1132976641, now seen corresponding path program 86 times [2022-03-15 15:51:17,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:17,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550278255] [2022-03-15 15:51:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:17,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:17,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:17,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550278255] [2022-03-15 15:51:17,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550278255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:17,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823099127] [2022-03-15 15:51:17,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:17,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:17,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:17,797 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) [2022-03-15 15:51:17,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 15:51:17,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:17,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:17,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:17,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:18,034 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 54 treesize of output 42 [2022-03-15 15:51:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:18,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:18,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:18,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:18,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823099127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:18,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:18,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:18,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111121860] [2022-03-15 15:51:18,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:18,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:18,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:18,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:18,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:18,227 INFO L87 Difference]: Start difference. First operand 129 states and 326 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:18,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:18,351 INFO L93 Difference]: Finished difference Result 141 states and 345 transitions. [2022-03-15 15:51:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:18,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:18,351 INFO L225 Difference]: With dead ends: 141 [2022-03-15 15:51:18,352 INFO L226 Difference]: Without dead ends: 135 [2022-03-15 15:51:18,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:18,352 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:18,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 82 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-15 15:51:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-03-15 15:51:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.5426356589147288) internal successors, (328), 129 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 328 transitions. [2022-03-15 15:51:18,354 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 328 transitions. Word has length 17 [2022-03-15 15:51:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:18,354 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 328 transitions. [2022-03-15 15:51:18,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 328 transitions. [2022-03-15 15:51:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:18,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:18,354 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:18,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:18,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:18,555 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:18,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:18,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1351955071, now seen corresponding path program 87 times [2022-03-15 15:51:18,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:18,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097442710] [2022-03-15 15:51:18,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:18,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:18,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:18,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097442710] [2022-03-15 15:51:18,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097442710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:18,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586209318] [2022-03-15 15:51:18,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:18,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:18,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:18,662 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) [2022-03-15 15:51:18,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 15:51:18,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:51:18,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:18,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:18,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:18,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:18,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:18,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:19,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586209318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:19,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:19,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-15 15:51:19,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723273593] [2022-03-15 15:51:19,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:19,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:51:19,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:19,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:51:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:51:19,012 INFO L87 Difference]: Start difference. First operand 130 states and 328 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:19,118 INFO L93 Difference]: Finished difference Result 159 states and 385 transitions. [2022-03-15 15:51:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:19,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:19,119 INFO L225 Difference]: With dead ends: 159 [2022-03-15 15:51:19,119 INFO L226 Difference]: Without dead ends: 159 [2022-03-15 15:51:19,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:51:19,119 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:19,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 84 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:19,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-15 15:51:19,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 130. [2022-03-15 15:51:19,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.5426356589147288) internal successors, (328), 129 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 328 transitions. [2022-03-15 15:51:19,121 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 328 transitions. Word has length 17 [2022-03-15 15:51:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:19,121 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 328 transitions. [2022-03-15 15:51:19,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 328 transitions. [2022-03-15 15:51:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:19,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:19,121 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:19,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:19,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:19,322 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:19,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash 565901051, now seen corresponding path program 88 times [2022-03-15 15:51:19,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:19,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256794804] [2022-03-15 15:51:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:19,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:19,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:19,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256794804] [2022-03-15 15:51:19,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256794804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:19,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420944164] [2022-03-15 15:51:19,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:19,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:19,409 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) [2022-03-15 15:51:19,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 15:51:19,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:19,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:19,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:19,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:19,601 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 72 treesize of output 56 [2022-03-15 15:51:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:19,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:19,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:19,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:19,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420944164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:19,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:19,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:19,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386567818] [2022-03-15 15:51:19,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:19,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:19,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:19,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:19,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:19,851 INFO L87 Difference]: Start difference. First operand 130 states and 328 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:20,001 INFO L93 Difference]: Finished difference Result 156 states and 370 transitions. [2022-03-15 15:51:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:20,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:20,002 INFO L225 Difference]: With dead ends: 156 [2022-03-15 15:51:20,002 INFO L226 Difference]: Without dead ends: 153 [2022-03-15 15:51:20,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:20,002 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:20,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 89 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-15 15:51:20,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 135. [2022-03-15 15:51:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.537313432835821) internal successors, (340), 134 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:20,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 340 transitions. [2022-03-15 15:51:20,004 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 340 transitions. Word has length 17 [2022-03-15 15:51:20,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:20,004 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 340 transitions. [2022-03-15 15:51:20,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:20,005 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 340 transitions. [2022-03-15 15:51:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:20,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:20,005 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:20,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:20,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-15 15:51:20,209 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:20,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:20,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1200249467, now seen corresponding path program 89 times [2022-03-15 15:51:20,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:20,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949033276] [2022-03-15 15:51:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:20,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:20,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:20,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949033276] [2022-03-15 15:51:20,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949033276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:20,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438790200] [2022-03-15 15:51:20,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:20,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:20,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:20,298 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) [2022-03-15 15:51:20,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 15:51:20,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:51:20,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:20,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:20,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:20,437 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 54 treesize of output 42 [2022-03-15 15:51:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:20,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:20,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:20,579 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 31 treesize of output 29 [2022-03-15 15:51:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:20,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438790200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:20,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:20,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-15 15:51:20,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818389040] [2022-03-15 15:51:20,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:20,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:51:20,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:20,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:51:20,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:51:20,601 INFO L87 Difference]: Start difference. First operand 135 states and 340 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:20,730 INFO L93 Difference]: Finished difference Result 173 states and 407 transitions. [2022-03-15 15:51:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:20,730 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:20,735 INFO L225 Difference]: With dead ends: 173 [2022-03-15 15:51:20,735 INFO L226 Difference]: Without dead ends: 173 [2022-03-15 15:51:20,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:20,735 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:20,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 104 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:20,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-15 15:51:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 135. [2022-03-15 15:51:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.537313432835821) internal successors, (340), 134 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 340 transitions. [2022-03-15 15:51:20,737 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 340 transitions. Word has length 17 [2022-03-15 15:51:20,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:20,737 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 340 transitions. [2022-03-15 15:51:20,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:20,737 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 340 transitions. [2022-03-15 15:51:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:20,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:20,738 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:20,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:20,939 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,SelfDestructingSolverStorable102 [2022-03-15 15:51:20,939 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:20,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:20,940 INFO L85 PathProgramCache]: Analyzing trace with hash -16601955, now seen corresponding path program 90 times [2022-03-15 15:51:20,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:20,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285978389] [2022-03-15 15:51:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:20,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:21,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:21,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285978389] [2022-03-15 15:51:21,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285978389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:21,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167449735] [2022-03-15 15:51:21,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:21,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:21,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:21,031 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) [2022-03-15 15:51:21,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 15:51:21,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:51:21,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:21,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:21,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:21,165 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 54 treesize of output 42 [2022-03-15 15:51:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:21,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:21,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:21,265 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 31 treesize of output 29 [2022-03-15 15:51:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:21,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167449735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:21,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:21,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:21,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901093721] [2022-03-15 15:51:21,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:21,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:21,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:21,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:21,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:21,282 INFO L87 Difference]: Start difference. First operand 135 states and 340 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:21,351 INFO L93 Difference]: Finished difference Result 154 states and 374 transitions. [2022-03-15 15:51:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:21,351 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:21,351 INFO L225 Difference]: With dead ends: 154 [2022-03-15 15:51:21,351 INFO L226 Difference]: Without dead ends: 152 [2022-03-15 15:51:21,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:21,351 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:21,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 80 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-15 15:51:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 135. [2022-03-15 15:51:21,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.529850746268657) internal successors, (339), 134 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2022-03-15 15:51:21,363 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 17 [2022-03-15 15:51:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:21,363 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2022-03-15 15:51:21,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2022-03-15 15:51:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:21,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:21,363 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:21,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:21,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 15:51:21,579 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1734601089, now seen corresponding path program 91 times [2022-03-15 15:51:21,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:21,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024102580] [2022-03-15 15:51:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:21,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:21,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:21,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024102580] [2022-03-15 15:51:21,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024102580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:21,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41957365] [2022-03-15 15:51:21,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:21,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:21,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:21,696 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) [2022-03-15 15:51:21,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 15:51:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:21,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:21,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:21,877 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 72 treesize of output 56 [2022-03-15 15:51:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:21,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:21,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:21,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:22,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41957365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:22,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:22,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:22,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79635112] [2022-03-15 15:51:22,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:22,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:22,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:22,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:22,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:22,032 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:22,096 INFO L93 Difference]: Finished difference Result 139 states and 345 transitions. [2022-03-15 15:51:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:22,096 INFO L225 Difference]: With dead ends: 139 [2022-03-15 15:51:22,096 INFO L226 Difference]: Without dead ends: 139 [2022-03-15 15:51:22,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:22,097 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:22,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-15 15:51:22,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 128. [2022-03-15 15:51:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.5511811023622046) internal successors, (324), 127 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) [2022-03-15 15:51:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 324 transitions. [2022-03-15 15:51:22,104 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 324 transitions. Word has length 17 [2022-03-15 15:51:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:22,104 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 324 transitions. [2022-03-15 15:51:22,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 324 transitions. [2022-03-15 15:51:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:22,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:22,104 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:22,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:22,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:22,320 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:22,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2018774921, now seen corresponding path program 92 times [2022-03-15 15:51:22,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:22,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528060599] [2022-03-15 15:51:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:22,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:22,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:22,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528060599] [2022-03-15 15:51:22,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528060599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:22,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615679524] [2022-03-15 15:51:22,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:22,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:22,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:22,389 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) [2022-03-15 15:51:22,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 15:51:22,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:22,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:22,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:22,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:22,525 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 54 treesize of output 42 [2022-03-15 15:51:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:22,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:22,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:22,578 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 49 treesize of output 45 [2022-03-15 15:51:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:22,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615679524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:22,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:22,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:22,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563711160] [2022-03-15 15:51:22,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:22,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:22,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:22,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:22,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:22,627 INFO L87 Difference]: Start difference. First operand 128 states and 324 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:22,713 INFO L93 Difference]: Finished difference Result 139 states and 340 transitions. [2022-03-15 15:51:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:22,714 INFO L225 Difference]: With dead ends: 139 [2022-03-15 15:51:22,714 INFO L226 Difference]: Without dead ends: 133 [2022-03-15 15:51:22,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:22,714 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:22,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 68 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-15 15:51:22,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2022-03-15 15:51:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.543307086614173) internal successors, (323), 127 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) [2022-03-15 15:51:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 323 transitions. [2022-03-15 15:51:22,716 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 323 transitions. Word has length 17 [2022-03-15 15:51:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:22,716 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 323 transitions. [2022-03-15 15:51:22,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 323 transitions. [2022-03-15 15:51:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:22,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:22,721 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:22,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 15:51:22,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:22,938 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:22,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash 466156791, now seen corresponding path program 93 times [2022-03-15 15:51:22,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:22,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086815137] [2022-03-15 15:51:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:22,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:23,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:23,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086815137] [2022-03-15 15:51:23,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086815137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:23,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181934450] [2022-03-15 15:51:23,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:23,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:23,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:23,009 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) [2022-03-15 15:51:23,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 15:51:23,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:51:23,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:23,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:23,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:23,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:23,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:23,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:51:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:23,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181934450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:23,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:23,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-15 15:51:23,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71248258] [2022-03-15 15:51:23,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:23,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:51:23,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:51:23,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:51:23,247 INFO L87 Difference]: Start difference. First operand 128 states and 323 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:23,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:23,360 INFO L93 Difference]: Finished difference Result 157 states and 380 transitions. [2022-03-15 15:51:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:51:23,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:23,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:23,361 INFO L225 Difference]: With dead ends: 157 [2022-03-15 15:51:23,361 INFO L226 Difference]: Without dead ends: 157 [2022-03-15 15:51:23,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:23,361 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:23,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 91 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-15 15:51:23,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 128. [2022-03-15 15:51:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.543307086614173) internal successors, (323), 127 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) [2022-03-15 15:51:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 323 transitions. [2022-03-15 15:51:23,376 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 323 transitions. Word has length 17 [2022-03-15 15:51:23,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:23,376 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 323 transitions. [2022-03-15 15:51:23,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:23,376 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 323 transitions. [2022-03-15 15:51:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:23,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:23,376 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:23,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:23,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:23,592 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:23,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1158459567, now seen corresponding path program 94 times [2022-03-15 15:51:23,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:23,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624085042] [2022-03-15 15:51:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:23,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:23,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:23,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624085042] [2022-03-15 15:51:23,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624085042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:23,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869707448] [2022-03-15 15:51:23,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:23,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:23,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:23,720 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) [2022-03-15 15:51:23,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 15:51:23,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:23,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:23,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:23,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:23,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:23,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-03-15 15:51:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:24,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:24,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:24,151 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 27 treesize of output 27 [2022-03-15 15:51:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:24,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869707448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:24,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:24,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:24,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028754656] [2022-03-15 15:51:24,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:24,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:24,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:24,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:24,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:24,198 INFO L87 Difference]: Start difference. First operand 128 states and 323 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:24,345 INFO L93 Difference]: Finished difference Result 186 states and 429 transitions. [2022-03-15 15:51:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:51:24,345 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:24,346 INFO L225 Difference]: With dead ends: 186 [2022-03-15 15:51:24,346 INFO L226 Difference]: Without dead ends: 186 [2022-03-15 15:51:24,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:51:24,346 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:24,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 104 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:24,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-15 15:51:24,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 129. [2022-03-15 15:51:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.5390625) internal successors, (325), 128 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 325 transitions. [2022-03-15 15:51:24,350 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 325 transitions. Word has length 17 [2022-03-15 15:51:24,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:24,350 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 325 transitions. [2022-03-15 15:51:24,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 325 transitions. [2022-03-15 15:51:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:24,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:24,351 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:24,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 15:51:24,552 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,SelfDestructingSolverStorable107 [2022-03-15 15:51:24,552 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:24,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1868285947, now seen corresponding path program 95 times [2022-03-15 15:51:24,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:24,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259311302] [2022-03-15 15:51:24,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:24,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:24,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:24,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259311302] [2022-03-15 15:51:24,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259311302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:24,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050864403] [2022-03-15 15:51:24,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:24,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:24,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:24,647 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) [2022-03-15 15:51:24,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 15:51:24,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:51:24,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:24,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:24,812 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 54 treesize of output 42 [2022-03-15 15:51:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:24,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:24,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:24,975 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 27 treesize of output 27 [2022-03-15 15:51:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:25,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050864403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:25,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:25,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:25,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278058444] [2022-03-15 15:51:25,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:25,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:25,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:25,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:25,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:25,015 INFO L87 Difference]: Start difference. First operand 129 states and 325 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:25,130 INFO L93 Difference]: Finished difference Result 172 states and 400 transitions. [2022-03-15 15:51:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:51:25,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:25,131 INFO L225 Difference]: With dead ends: 172 [2022-03-15 15:51:25,131 INFO L226 Difference]: Without dead ends: 169 [2022-03-15 15:51:25,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:25,131 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:25,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 107 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:25,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-15 15:51:25,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 136. [2022-03-15 15:51:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.5407407407407407) internal successors, (343), 135 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:25,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 343 transitions. [2022-03-15 15:51:25,137 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 343 transitions. Word has length 17 [2022-03-15 15:51:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:25,137 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 343 transitions. [2022-03-15 15:51:25,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 343 transitions. [2022-03-15 15:51:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:25,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:25,137 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:25,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 15:51:25,351 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,SelfDestructingSolverStorable108 [2022-03-15 15:51:25,351 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:25,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:25,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1792332933, now seen corresponding path program 96 times [2022-03-15 15:51:25,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:25,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103203763] [2022-03-15 15:51:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:25,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:25,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:25,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103203763] [2022-03-15 15:51:25,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103203763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:25,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862777129] [2022-03-15 15:51:25,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:25,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:25,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:25,459 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) [2022-03-15 15:51:25,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 15:51:25,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:51:25,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:25,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:25,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:25,598 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 75 treesize of output 59 [2022-03-15 15:51:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:25,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:25,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:25,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:51:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:25,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862777129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:25,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:25,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:25,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795135173] [2022-03-15 15:51:25,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:25,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:25,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:25,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:25,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:25,745 INFO L87 Difference]: Start difference. First operand 136 states and 343 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:25,826 INFO L93 Difference]: Finished difference Result 168 states and 397 transitions. [2022-03-15 15:51:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:51:25,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:25,827 INFO L225 Difference]: With dead ends: 168 [2022-03-15 15:51:25,827 INFO L226 Difference]: Without dead ends: 168 [2022-03-15 15:51:25,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:25,827 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:25,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 60 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:25,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-15 15:51:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2022-03-15 15:51:25,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.5407407407407407) internal successors, (343), 135 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 343 transitions. [2022-03-15 15:51:25,829 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 343 transitions. Word has length 17 [2022-03-15 15:51:25,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:25,829 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 343 transitions. [2022-03-15 15:51:25,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:25,829 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 343 transitions. [2022-03-15 15:51:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:25,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:25,830 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:25,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:26,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:26,030 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:26,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1285782941, now seen corresponding path program 97 times [2022-03-15 15:51:26,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:26,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785098584] [2022-03-15 15:51:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:26,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:26,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:26,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785098584] [2022-03-15 15:51:26,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785098584] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:26,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764252942] [2022-03-15 15:51:26,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:26,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:26,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:26,120 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) [2022-03-15 15:51:26,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 15:51:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:26,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:26,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:26,313 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 72 treesize of output 56 [2022-03-15 15:51:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:26,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:26,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:26,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:51:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:26,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764252942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:26,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:26,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:26,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215462076] [2022-03-15 15:51:26,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:26,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:26,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:26,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:26,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:26,484 INFO L87 Difference]: Start difference. First operand 136 states and 343 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:26,653 INFO L93 Difference]: Finished difference Result 166 states and 390 transitions. [2022-03-15 15:51:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:51:26,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:26,654 INFO L225 Difference]: With dead ends: 166 [2022-03-15 15:51:26,654 INFO L226 Difference]: Without dead ends: 164 [2022-03-15 15:51:26,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:51:26,654 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:26,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 95 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-15 15:51:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 136. [2022-03-15 15:51:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.533333333333333) internal successors, (342), 135 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2022-03-15 15:51:26,656 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 17 [2022-03-15 15:51:26,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:26,656 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2022-03-15 15:51:26,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:26,656 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2022-03-15 15:51:26,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:26,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:26,657 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:26,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-15 15:51:26,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:26,857 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:26,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:26,857 INFO L85 PathProgramCache]: Analyzing trace with hash -432216193, now seen corresponding path program 98 times [2022-03-15 15:51:26,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:26,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598224231] [2022-03-15 15:51:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:26,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:26,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:26,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598224231] [2022-03-15 15:51:26,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598224231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:26,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597741196] [2022-03-15 15:51:26,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:26,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:26,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:26,930 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) [2022-03-15 15:51:26,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 15:51:27,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:27,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:27,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:27,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:27,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:27,122 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-03-15 15:51:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:27,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:27,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:27,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:51:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:27,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597741196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:27,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:27,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:27,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800758124] [2022-03-15 15:51:27,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:27,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:27,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:27,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:27,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:27,254 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:27,348 INFO L93 Difference]: Finished difference Result 162 states and 390 transitions. [2022-03-15 15:51:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:51:27,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:27,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:27,348 INFO L225 Difference]: With dead ends: 162 [2022-03-15 15:51:27,348 INFO L226 Difference]: Without dead ends: 162 [2022-03-15 15:51:27,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:27,349 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:27,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 60 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 267 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-03-15 15:51:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-15 15:51:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 135. [2022-03-15 15:51:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.537313432835821) internal successors, (340), 134 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 340 transitions. [2022-03-15 15:51:27,351 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 340 transitions. Word has length 17 [2022-03-15 15:51:27,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:27,351 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 340 transitions. [2022-03-15 15:51:27,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:27,351 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 340 transitions. [2022-03-15 15:51:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:27,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:27,351 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:27,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-15 15:51:27,567 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,SelfDestructingSolverStorable111 [2022-03-15 15:51:27,567 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:27,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1823638519, now seen corresponding path program 99 times [2022-03-15 15:51:27,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:27,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997954350] [2022-03-15 15:51:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:27,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:27,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:27,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997954350] [2022-03-15 15:51:27,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997954350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:27,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137180554] [2022-03-15 15:51:27,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:27,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:27,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:27,661 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) [2022-03-15 15:51:27,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 15:51:27,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:51:27,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:27,854 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 54 treesize of output 42 [2022-03-15 15:51:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:27,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:27,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:27,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:51:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:27,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137180554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:27,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:27,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:27,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57237865] [2022-03-15 15:51:27,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:27,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:27,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:27,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:27,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:27,999 INFO L87 Difference]: Start difference. First operand 135 states and 340 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:28,110 INFO L93 Difference]: Finished difference Result 144 states and 353 transitions. [2022-03-15 15:51:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:28,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:28,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:28,111 INFO L225 Difference]: With dead ends: 144 [2022-03-15 15:51:28,111 INFO L226 Difference]: Without dead ends: 140 [2022-03-15 15:51:28,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:28,112 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:28,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 46 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:28,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-15 15:51:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-03-15 15:51:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.529850746268657) internal successors, (339), 134 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2022-03-15 15:51:28,113 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 17 [2022-03-15 15:51:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:28,113 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2022-03-15 15:51:28,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2022-03-15 15:51:28,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:28,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:28,114 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:28,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:28,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:28,314 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1716580343, now seen corresponding path program 100 times [2022-03-15 15:51:28,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:28,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574517173] [2022-03-15 15:51:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:28,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:28,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:28,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574517173] [2022-03-15 15:51:28,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574517173] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:28,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451640010] [2022-03-15 15:51:28,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:28,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:28,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:28,408 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) [2022-03-15 15:51:28,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 15:51:28,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:28,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:28,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:28,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:28,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:28,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:28,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:51:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:28,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451640010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:28,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:28,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-15 15:51:28,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640722672] [2022-03-15 15:51:28,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:28,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:51:28,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:51:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:51:28,677 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:28,854 INFO L93 Difference]: Finished difference Result 151 states and 366 transitions. [2022-03-15 15:51:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:51:28,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:28,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:28,855 INFO L225 Difference]: With dead ends: 151 [2022-03-15 15:51:28,855 INFO L226 Difference]: Without dead ends: 151 [2022-03-15 15:51:28,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:28,855 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:28,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 81 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-15 15:51:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 130. [2022-03-15 15:51:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.5348837209302326) internal successors, (327), 129 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:28,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 327 transitions. [2022-03-15 15:51:28,857 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 327 transitions. Word has length 17 [2022-03-15 15:51:28,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:28,857 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 327 transitions. [2022-03-15 15:51:28,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 327 transitions. [2022-03-15 15:51:28,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:28,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:28,857 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:28,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:29,058 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,SelfDestructingSolverStorable113 [2022-03-15 15:51:29,058 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1744764055, now seen corresponding path program 101 times [2022-03-15 15:51:29,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:29,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126081730] [2022-03-15 15:51:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:29,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:29,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:29,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126081730] [2022-03-15 15:51:29,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126081730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:29,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020059381] [2022-03-15 15:51:29,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:29,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:29,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:29,132 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) [2022-03-15 15:51:29,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 15:51:29,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:51:29,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:29,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:29,291 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 54 treesize of output 42 [2022-03-15 15:51:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:29,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:29,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:29,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:29,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020059381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:29,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:29,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:29,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62131401] [2022-03-15 15:51:29,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:29,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:29,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:29,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:29,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:29,405 INFO L87 Difference]: Start difference. First operand 130 states and 327 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:29,480 INFO L93 Difference]: Finished difference Result 143 states and 348 transitions. [2022-03-15 15:51:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:29,480 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:29,481 INFO L225 Difference]: With dead ends: 143 [2022-03-15 15:51:29,481 INFO L226 Difference]: Without dead ends: 134 [2022-03-15 15:51:29,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:29,481 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:29,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 88 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-15 15:51:29,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2022-03-15 15:51:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.5307692307692307) internal successors, (329), 130 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:29,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 329 transitions. [2022-03-15 15:51:29,483 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 329 transitions. Word has length 17 [2022-03-15 15:51:29,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:29,483 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 329 transitions. [2022-03-15 15:51:29,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:29,483 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 329 transitions. [2022-03-15 15:51:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:29,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:29,483 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:29,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:29,699 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,SelfDestructingSolverStorable114 [2022-03-15 15:51:29,699 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:29,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:29,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2021292311, now seen corresponding path program 102 times [2022-03-15 15:51:29,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:29,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090716950] [2022-03-15 15:51:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:29,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:29,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:29,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090716950] [2022-03-15 15:51:29,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090716950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:29,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851912395] [2022-03-15 15:51:29,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:29,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:29,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:29,763 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) [2022-03-15 15:51:29,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 15:51:29,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:51:29,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:29,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:29,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:29,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:30,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:30,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:30,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851912395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:30,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:30,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:30,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476958205] [2022-03-15 15:51:30,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:30,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:30,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:30,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:30,060 INFO L87 Difference]: Start difference. First operand 131 states and 329 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:30,134 INFO L93 Difference]: Finished difference Result 146 states and 359 transitions. [2022-03-15 15:51:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:30,135 INFO L225 Difference]: With dead ends: 146 [2022-03-15 15:51:30,135 INFO L226 Difference]: Without dead ends: 146 [2022-03-15 15:51:30,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:30,135 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:30,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 74 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-15 15:51:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2022-03-15 15:51:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.5307692307692307) internal successors, (329), 130 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 329 transitions. [2022-03-15 15:51:30,139 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 329 transitions. Word has length 17 [2022-03-15 15:51:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:30,139 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 329 transitions. [2022-03-15 15:51:30,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 329 transitions. [2022-03-15 15:51:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:30,140 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:30,140 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:30,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-15 15:51:30,340 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,SelfDestructingSolverStorable115 [2022-03-15 15:51:30,340 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:30,341 INFO L85 PathProgramCache]: Analyzing trace with hash -619163155, now seen corresponding path program 103 times [2022-03-15 15:51:30,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:30,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860246499] [2022-03-15 15:51:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:30,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:30,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:30,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:30,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860246499] [2022-03-15 15:51:30,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860246499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:30,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884502834] [2022-03-15 15:51:30,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:30,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:30,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:30,452 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) [2022-03-15 15:51:30,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 15:51:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:30,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:30,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:30,635 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 54 treesize of output 42 [2022-03-15 15:51:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:30,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:30,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:30,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:30,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884502834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:30,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:30,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:51:30,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21168518] [2022-03-15 15:51:30,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:30,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:51:30,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:51:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:30,838 INFO L87 Difference]: Start difference. First operand 131 states and 329 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:30,957 INFO L93 Difference]: Finished difference Result 141 states and 345 transitions. [2022-03-15 15:51:30,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:30,957 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:30,958 INFO L225 Difference]: With dead ends: 141 [2022-03-15 15:51:30,958 INFO L226 Difference]: Without dead ends: 135 [2022-03-15 15:51:30,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:30,958 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:30,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 65 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:30,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-15 15:51:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2022-03-15 15:51:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5267175572519083) internal successors, (331), 131 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 331 transitions. [2022-03-15 15:51:30,960 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 331 transitions. Word has length 17 [2022-03-15 15:51:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:30,960 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 331 transitions. [2022-03-15 15:51:30,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 331 transitions. [2022-03-15 15:51:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:30,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:30,960 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:30,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:31,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:31,161 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1865768557, now seen corresponding path program 104 times [2022-03-15 15:51:31,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:31,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154309479] [2022-03-15 15:51:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:31,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:31,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:31,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154309479] [2022-03-15 15:51:31,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154309479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:31,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122144675] [2022-03-15 15:51:31,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:31,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:31,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:31,252 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) [2022-03-15 15:51:31,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 15:51:31,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:31,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:31,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:31,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:31,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:31,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:31,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:31,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122144675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:31,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:31,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:31,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290939420] [2022-03-15 15:51:31,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:31,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:31,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:31,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:31,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:31,599 INFO L87 Difference]: Start difference. First operand 132 states and 331 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:31,753 INFO L93 Difference]: Finished difference Result 159 states and 385 transitions. [2022-03-15 15:51:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:31,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:31,753 INFO L225 Difference]: With dead ends: 159 [2022-03-15 15:51:31,753 INFO L226 Difference]: Without dead ends: 159 [2022-03-15 15:51:31,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:31,754 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:31,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 71 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:31,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-15 15:51:31,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 132. [2022-03-15 15:51:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.5267175572519083) internal successors, (331), 131 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 331 transitions. [2022-03-15 15:51:31,755 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 331 transitions. Word has length 17 [2022-03-15 15:51:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:31,756 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 331 transitions. [2022-03-15 15:51:31,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 331 transitions. [2022-03-15 15:51:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:31,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:31,756 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:31,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:31,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:31,956 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:31,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1079714537, now seen corresponding path program 105 times [2022-03-15 15:51:31,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:31,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662986886] [2022-03-15 15:51:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:31,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:32,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:32,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662986886] [2022-03-15 15:51:32,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662986886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:32,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019207809] [2022-03-15 15:51:32,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:32,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:32,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:32,042 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) [2022-03-15 15:51:32,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 15:51:32,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:51:32,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:32,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:32,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:32,259 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 75 treesize of output 59 [2022-03-15 15:51:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:32,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:32,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:32,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:32,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019207809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:32,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:32,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:51:32,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143522223] [2022-03-15 15:51:32,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:32,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:51:32,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:32,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:51:32,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:32,514 INFO L87 Difference]: Start difference. First operand 132 states and 331 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:32,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:32,700 INFO L93 Difference]: Finished difference Result 160 states and 378 transitions. [2022-03-15 15:51:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:32,700 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:32,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:32,700 INFO L225 Difference]: With dead ends: 160 [2022-03-15 15:51:32,701 INFO L226 Difference]: Without dead ends: 157 [2022-03-15 15:51:32,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:51:32,701 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:32,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 112 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:32,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-15 15:51:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 137. [2022-03-15 15:51:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.5220588235294117) internal successors, (343), 136 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 343 transitions. [2022-03-15 15:51:32,703 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 343 transitions. Word has length 17 [2022-03-15 15:51:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:32,703 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 343 transitions. [2022-03-15 15:51:32,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 343 transitions. [2022-03-15 15:51:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:32,703 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:32,703 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:32,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:32,903 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,SelfDestructingSolverStorable118 [2022-03-15 15:51:32,904 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:32,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1714062953, now seen corresponding path program 106 times [2022-03-15 15:51:32,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:32,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366679323] [2022-03-15 15:51:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:32,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:32,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:32,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366679323] [2022-03-15 15:51:32,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366679323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:32,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998149957] [2022-03-15 15:51:32,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:32,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:32,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:32,987 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) [2022-03-15 15:51:32,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 15:51:33,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:33,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:33,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:33,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:33,149 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 54 treesize of output 42 [2022-03-15 15:51:33,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:33,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:33,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:33,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:33,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998149957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:33,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:33,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:33,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140894398] [2022-03-15 15:51:33,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:33,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:33,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:33,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:33,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:33,384 INFO L87 Difference]: Start difference. First operand 137 states and 343 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:33,594 INFO L93 Difference]: Finished difference Result 170 states and 406 transitions. [2022-03-15 15:51:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:33,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:33,594 INFO L225 Difference]: With dead ends: 170 [2022-03-15 15:51:33,594 INFO L226 Difference]: Without dead ends: 168 [2022-03-15 15:51:33,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:51:33,595 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:33,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 93 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-15 15:51:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 137. [2022-03-15 15:51:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.514705882352941) internal successors, (342), 136 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 342 transitions. [2022-03-15 15:51:33,597 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 342 transitions. Word has length 17 [2022-03-15 15:51:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:33,597 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 342 transitions. [2022-03-15 15:51:33,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 342 transitions. [2022-03-15 15:51:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:33,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:33,597 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:33,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:33,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:33,807 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:33,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1220787603, now seen corresponding path program 107 times [2022-03-15 15:51:33,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:33,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392586268] [2022-03-15 15:51:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:33,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:33,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:33,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392586268] [2022-03-15 15:51:33,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392586268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:33,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276715751] [2022-03-15 15:51:33,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:33,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:33,903 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) [2022-03-15 15:51:33,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 15:51:34,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:51:34,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:34,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:34,154 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 75 treesize of output 59 [2022-03-15 15:51:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:34,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:34,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:34,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:34,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276715751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:34,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:34,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:51:34,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584919430] [2022-03-15 15:51:34,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:34,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:51:34,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:51:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:34,397 INFO L87 Difference]: Start difference. First operand 137 states and 342 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:34,499 INFO L93 Difference]: Finished difference Result 143 states and 353 transitions. [2022-03-15 15:51:34,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:34,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:34,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:34,500 INFO L225 Difference]: With dead ends: 143 [2022-03-15 15:51:34,500 INFO L226 Difference]: Without dead ends: 143 [2022-03-15 15:51:34,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:34,500 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:34,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 57 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-15 15:51:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 130. [2022-03-15 15:51:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.5348837209302326) internal successors, (327), 129 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 327 transitions. [2022-03-15 15:51:34,502 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 327 transitions. Word has length 17 [2022-03-15 15:51:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:34,502 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 327 transitions. [2022-03-15 15:51:34,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 327 transitions. [2022-03-15 15:51:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:34,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:34,503 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:34,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:34,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:34,703 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:34,703 INFO L85 PathProgramCache]: Analyzing trace with hash 193916257, now seen corresponding path program 108 times [2022-03-15 15:51:34,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:34,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653387560] [2022-03-15 15:51:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:34,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:34,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:34,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653387560] [2022-03-15 15:51:34,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653387560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:34,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210523690] [2022-03-15 15:51:34,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:34,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:34,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:34,791 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) [2022-03-15 15:51:34,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 15:51:34,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:51:34,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:34,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:34,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:34,976 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 75 treesize of output 59 [2022-03-15 15:51:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:35,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:35,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:35,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:51:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:35,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210523690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:35,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:35,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:35,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629126788] [2022-03-15 15:51:35,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:35,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:35,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:35,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:35,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:35,216 INFO L87 Difference]: Start difference. First operand 130 states and 327 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:35,389 INFO L93 Difference]: Finished difference Result 157 states and 370 transitions. [2022-03-15 15:51:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:35,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:35,390 INFO L225 Difference]: With dead ends: 157 [2022-03-15 15:51:35,390 INFO L226 Difference]: Without dead ends: 154 [2022-03-15 15:51:35,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:51:35,390 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:35,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 109 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-15 15:51:35,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2022-03-15 15:51:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.518796992481203) internal successors, (335), 133 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 335 transitions. [2022-03-15 15:51:35,392 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 335 transitions. Word has length 17 [2022-03-15 15:51:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:35,392 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 335 transitions. [2022-03-15 15:51:35,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 335 transitions. [2022-03-15 15:51:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:35,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:35,392 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:35,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:35,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:35,593 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:35,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:35,593 INFO L85 PathProgramCache]: Analyzing trace with hash -388586749, now seen corresponding path program 109 times [2022-03-15 15:51:35,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:35,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996710619] [2022-03-15 15:51:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:35,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:35,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:35,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:35,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996710619] [2022-03-15 15:51:35,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996710619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:35,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87328982] [2022-03-15 15:51:35,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:35,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:35,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:35,667 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) [2022-03-15 15:51:35,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 15:51:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:35,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:35,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:35,816 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 54 treesize of output 42 [2022-03-15 15:51:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:35,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:35,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:35,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:51:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:35,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87328982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:35,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:35,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:35,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784209507] [2022-03-15 15:51:35,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:35,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:35,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:35,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:35,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:35,947 INFO L87 Difference]: Start difference. First operand 134 states and 335 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:36,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:36,064 INFO L93 Difference]: Finished difference Result 161 states and 386 transitions. [2022-03-15 15:51:36,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:36,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:36,065 INFO L225 Difference]: With dead ends: 161 [2022-03-15 15:51:36,065 INFO L226 Difference]: Without dead ends: 159 [2022-03-15 15:51:36,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:51:36,065 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:36,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 119 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-15 15:51:36,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2022-03-15 15:51:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.511278195488722) internal successors, (334), 133 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:36,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2022-03-15 15:51:36,067 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 17 [2022-03-15 15:51:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:36,067 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2022-03-15 15:51:36,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2022-03-15 15:51:36,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:36,067 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:36,067 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:36,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:36,277 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,SelfDestructingSolverStorable122 [2022-03-15 15:51:36,277 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:36,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:36,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2106585883, now seen corresponding path program 110 times [2022-03-15 15:51:36,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:36,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715573089] [2022-03-15 15:51:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:36,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:36,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:36,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715573089] [2022-03-15 15:51:36,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715573089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:36,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089223607] [2022-03-15 15:51:36,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:36,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:36,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:36,341 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) [2022-03-15 15:51:36,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 15:51:36,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:36,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:36,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:36,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:36,484 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 75 treesize of output 59 [2022-03-15 15:51:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:36,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:36,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:36,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:51:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:36,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089223607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:36,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:36,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:36,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470478922] [2022-03-15 15:51:36,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:36,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:36,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:36,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:36,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:36,653 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:36,741 INFO L93 Difference]: Finished difference Result 140 states and 345 transitions. [2022-03-15 15:51:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:36,742 INFO L225 Difference]: With dead ends: 140 [2022-03-15 15:51:36,742 INFO L226 Difference]: Without dead ends: 140 [2022-03-15 15:51:36,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:36,742 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:36,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 73 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-15 15:51:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-03-15 15:51:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.5193798449612403) internal successors, (325), 129 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 325 transitions. [2022-03-15 15:51:36,744 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 325 transitions. Word has length 17 [2022-03-15 15:51:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:36,744 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 325 transitions. [2022-03-15 15:51:36,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 325 transitions. [2022-03-15 15:51:36,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:36,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:36,744 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:36,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:36,960 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,SelfDestructingSolverStorable123 [2022-03-15 15:51:36,960 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1100062957, now seen corresponding path program 111 times [2022-03-15 15:51:36,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:36,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786965289] [2022-03-15 15:51:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:36,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:37,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:37,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786965289] [2022-03-15 15:51:37,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786965289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:37,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019736674] [2022-03-15 15:51:37,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:37,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:37,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:37,053 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) [2022-03-15 15:51:37,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 15:51:37,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:51:37,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:37,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:37,285 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 54 treesize of output 42 [2022-03-15 15:51:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:37,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:37,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:37,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:51:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:37,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019736674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:37,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:37,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:37,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130774212] [2022-03-15 15:51:37,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:37,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:37,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:37,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:37,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:37,476 INFO L87 Difference]: Start difference. First operand 130 states and 325 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:37,573 INFO L93 Difference]: Finished difference Result 140 states and 341 transitions. [2022-03-15 15:51:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:51:37,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:37,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:37,573 INFO L225 Difference]: With dead ends: 140 [2022-03-15 15:51:37,573 INFO L226 Difference]: Without dead ends: 134 [2022-03-15 15:51:37,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:37,574 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:37,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 58 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-15 15:51:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2022-03-15 15:51:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.5153846153846153) internal successors, (327), 130 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2022-03-15 15:51:37,575 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 17 [2022-03-15 15:51:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:37,575 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2022-03-15 15:51:37,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2022-03-15 15:51:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:37,576 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:37,576 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:37,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:37,776 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,SelfDestructingSolverStorable124 [2022-03-15 15:51:37,776 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:37,777 INFO L85 PathProgramCache]: Analyzing trace with hash -709972627, now seen corresponding path program 112 times [2022-03-15 15:51:37,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:37,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368284253] [2022-03-15 15:51:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:37,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:37,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:37,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368284253] [2022-03-15 15:51:37,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368284253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:37,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335420179] [2022-03-15 15:51:37,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:37,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:37,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:37,838 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) [2022-03-15 15:51:37,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 15:51:37,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:37,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:37,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:37,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:37,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:38,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:38,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:51:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:38,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335420179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:38,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:38,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:38,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553678444] [2022-03-15 15:51:38,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:38,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:38,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:38,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:38,131 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:38,246 INFO L93 Difference]: Finished difference Result 152 states and 369 transitions. [2022-03-15 15:51:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:38,247 INFO L225 Difference]: With dead ends: 152 [2022-03-15 15:51:38,247 INFO L226 Difference]: Without dead ends: 152 [2022-03-15 15:51:38,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:38,247 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:38,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 75 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-15 15:51:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 131. [2022-03-15 15:51:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.5153846153846153) internal successors, (327), 130 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:38,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2022-03-15 15:51:38,249 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 17 [2022-03-15 15:51:38,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:38,249 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2022-03-15 15:51:38,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:38,249 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2022-03-15 15:51:38,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:38,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:38,250 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:38,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-15 15:51:38,450 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,SelfDestructingSolverStorable125 [2022-03-15 15:51:38,450 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:38,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1496026647, now seen corresponding path program 113 times [2022-03-15 15:51:38,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:38,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449189481] [2022-03-15 15:51:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:38,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:38,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:38,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449189481] [2022-03-15 15:51:38,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449189481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:38,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156397562] [2022-03-15 15:51:38,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:38,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:38,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:38,548 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) [2022-03-15 15:51:38,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 15:51:38,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:51:38,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:38,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:38,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:38,771 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 75 treesize of output 59 [2022-03-15 15:51:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:38,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:38,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:38,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:51:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:39,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156397562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:39,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:39,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:39,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138527486] [2022-03-15 15:51:39,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:39,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:39,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:39,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:39,024 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:39,195 INFO L93 Difference]: Finished difference Result 159 states and 374 transitions. [2022-03-15 15:51:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:51:39,195 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:39,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:39,196 INFO L225 Difference]: With dead ends: 159 [2022-03-15 15:51:39,196 INFO L226 Difference]: Without dead ends: 156 [2022-03-15 15:51:39,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:39,196 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:39,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 84 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:39,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-15 15:51:39,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 136. [2022-03-15 15:51:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.511111111111111) internal successors, (339), 135 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 339 transitions. [2022-03-15 15:51:39,198 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 339 transitions. Word has length 17 [2022-03-15 15:51:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:39,198 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 339 transitions. [2022-03-15 15:51:39,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:39,198 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 339 transitions. [2022-03-15 15:51:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:39,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:39,198 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:39,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:39,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:39,399 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:39,399 INFO L85 PathProgramCache]: Analyzing trace with hash -861678231, now seen corresponding path program 114 times [2022-03-15 15:51:39,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:39,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214331446] [2022-03-15 15:51:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:39,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:39,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:39,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214331446] [2022-03-15 15:51:39,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214331446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:39,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607814624] [2022-03-15 15:51:39,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:39,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:39,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:39,483 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) [2022-03-15 15:51:39,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 15:51:39,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:51:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:39,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:39,661 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 54 treesize of output 42 [2022-03-15 15:51:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:39,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:39,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:39,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:51:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:39,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607814624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:39,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:39,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:39,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337035939] [2022-03-15 15:51:39,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:39,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:39,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:39,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:39,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:39,886 INFO L87 Difference]: Start difference. First operand 136 states and 339 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:40,015 INFO L93 Difference]: Finished difference Result 182 states and 423 transitions. [2022-03-15 15:51:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:51:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:40,016 INFO L225 Difference]: With dead ends: 182 [2022-03-15 15:51:40,016 INFO L226 Difference]: Without dead ends: 182 [2022-03-15 15:51:40,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:40,016 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:40,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-15 15:51:40,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2022-03-15 15:51:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.511111111111111) internal successors, (339), 135 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 339 transitions. [2022-03-15 15:51:40,018 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 339 transitions. Word has length 17 [2022-03-15 15:51:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:40,018 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 339 transitions. [2022-03-15 15:51:40,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 339 transitions. [2022-03-15 15:51:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:40,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:40,019 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:40,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:40,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:40,219 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:40,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:40,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2078529653, now seen corresponding path program 115 times [2022-03-15 15:51:40,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:40,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374719768] [2022-03-15 15:51:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:40,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:40,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:40,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374719768] [2022-03-15 15:51:40,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374719768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:40,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673611002] [2022-03-15 15:51:40,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:40,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:40,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:40,310 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) [2022-03-15 15:51:40,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 15:51:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:40,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:40,478 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 54 treesize of output 42 [2022-03-15 15:51:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:40,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:40,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:40,629 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 27 treesize of output 27 [2022-03-15 15:51:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:40,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673611002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:40,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:40,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:40,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17845134] [2022-03-15 15:51:40,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:40,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:40,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:40,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:40,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:40,682 INFO L87 Difference]: Start difference. First operand 136 states and 339 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:40,771 INFO L93 Difference]: Finished difference Result 163 states and 390 transitions. [2022-03-15 15:51:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:40,772 INFO L225 Difference]: With dead ends: 163 [2022-03-15 15:51:40,772 INFO L226 Difference]: Without dead ends: 161 [2022-03-15 15:51:40,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:40,772 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:40,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 60 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:40,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-15 15:51:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 136. [2022-03-15 15:51:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.5037037037037035) internal successors, (338), 135 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 338 transitions. [2022-03-15 15:51:40,774 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 338 transitions. Word has length 17 [2022-03-15 15:51:40,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:40,774 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 338 transitions. [2022-03-15 15:51:40,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 338 transitions. [2022-03-15 15:51:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:40,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:40,775 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:40,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:40,975 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,SelfDestructingSolverStorable128 [2022-03-15 15:51:40,975 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:40,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:40,975 INFO L85 PathProgramCache]: Analyzing trace with hash 498438509, now seen corresponding path program 116 times [2022-03-15 15:51:40,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:40,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975853571] [2022-03-15 15:51:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:41,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:41,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975853571] [2022-03-15 15:51:41,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975853571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:41,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28150092] [2022-03-15 15:51:41,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:41,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:41,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:41,045 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) [2022-03-15 15:51:41,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 15:51:41,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:41,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:41,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:41,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:41,198 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 75 treesize of output 59 [2022-03-15 15:51:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:41,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:41,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:41,272 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 49 treesize of output 45 [2022-03-15 15:51:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:41,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28150092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:41,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:41,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:41,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737927928] [2022-03-15 15:51:41,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:41,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:41,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:41,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:41,328 INFO L87 Difference]: Start difference. First operand 136 states and 338 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:41,394 INFO L93 Difference]: Finished difference Result 142 states and 349 transitions. [2022-03-15 15:51:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:41,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:41,395 INFO L225 Difference]: With dead ends: 142 [2022-03-15 15:51:41,395 INFO L226 Difference]: Without dead ends: 142 [2022-03-15 15:51:41,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:41,395 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:41,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:41,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-15 15:51:41,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2022-03-15 15:51:41,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.5193798449612403) internal successors, (325), 129 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 325 transitions. [2022-03-15 15:51:41,397 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 325 transitions. Word has length 17 [2022-03-15 15:51:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:41,397 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 325 transitions. [2022-03-15 15:51:41,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 325 transitions. [2022-03-15 15:51:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:41,397 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:41,397 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:41,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:41,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:41,613 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:41,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2124453971, now seen corresponding path program 117 times [2022-03-15 15:51:41,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:41,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231157982] [2022-03-15 15:51:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:41,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:41,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:41,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231157982] [2022-03-15 15:51:41,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231157982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:41,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004387899] [2022-03-15 15:51:41,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:41,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:41,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:41,686 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) [2022-03-15 15:51:41,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 15:51:41,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:51:41,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:41,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:41,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:41,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:41,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-03-15 15:51:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:41,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:41,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:41,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:51:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:42,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004387899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:42,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:42,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:42,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068150845] [2022-03-15 15:51:42,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:42,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:42,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:42,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:42,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:42,068 INFO L87 Difference]: Start difference. First operand 130 states and 325 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:42,151 INFO L93 Difference]: Finished difference Result 162 states and 381 transitions. [2022-03-15 15:51:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:42,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:42,152 INFO L225 Difference]: With dead ends: 162 [2022-03-15 15:51:42,152 INFO L226 Difference]: Without dead ends: 162 [2022-03-15 15:51:42,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:42,152 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:42,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 84 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 177 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-03-15 15:51:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-15 15:51:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2022-03-15 15:51:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.5193798449612403) internal successors, (325), 129 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 325 transitions. [2022-03-15 15:51:42,154 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 325 transitions. Word has length 17 [2022-03-15 15:51:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:42,154 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 325 transitions. [2022-03-15 15:51:42,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 325 transitions. [2022-03-15 15:51:42,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:42,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:42,155 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:42,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:42,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:42,371 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:42,371 INFO L85 PathProgramCache]: Analyzing trace with hash -764337231, now seen corresponding path program 118 times [2022-03-15 15:51:42,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:42,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675966400] [2022-03-15 15:51:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:42,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:42,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:42,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675966400] [2022-03-15 15:51:42,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675966400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:42,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807890261] [2022-03-15 15:51:42,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:42,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:42,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:42,432 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) [2022-03-15 15:51:42,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 15:51:42,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:42,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:42,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:42,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:42,565 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 54 treesize of output 42 [2022-03-15 15:51:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:42,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:42,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:42,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:51:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:42,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807890261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:42,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:42,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:42,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844869992] [2022-03-15 15:51:42,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:42,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:42,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:42,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:42,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:42,699 INFO L87 Difference]: Start difference. First operand 130 states and 325 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:42,872 INFO L93 Difference]: Finished difference Result 186 states and 426 transitions. [2022-03-15 15:51:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:51:42,872 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:42,872 INFO L225 Difference]: With dead ends: 186 [2022-03-15 15:51:42,872 INFO L226 Difference]: Without dead ends: 186 [2022-03-15 15:51:42,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:51:42,873 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:42,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 108 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-15 15:51:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 134. [2022-03-15 15:51:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.5413533834586466) internal successors, (338), 133 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2022-03-15 15:51:42,875 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 17 [2022-03-15 15:51:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:42,875 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2022-03-15 15:51:42,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2022-03-15 15:51:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:42,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:42,875 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:42,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:43,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:43,090 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:43,090 INFO L85 PathProgramCache]: Analyzing trace with hash 647509101, now seen corresponding path program 119 times [2022-03-15 15:51:43,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:43,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476877368] [2022-03-15 15:51:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:43,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:43,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:43,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476877368] [2022-03-15 15:51:43,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476877368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:43,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170743922] [2022-03-15 15:51:43,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:43,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:43,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:43,189 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) [2022-03-15 15:51:43,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 15:51:43,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:43,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:43,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:43,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:43,472 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 54 treesize of output 42 [2022-03-15 15:51:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:43,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:43,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:43,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:51:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:43,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170743922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:43,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:43,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:43,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526510276] [2022-03-15 15:51:43,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:43,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:43,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:43,652 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:43,725 INFO L93 Difference]: Finished difference Result 141 states and 348 transitions. [2022-03-15 15:51:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:43,726 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:43,726 INFO L225 Difference]: With dead ends: 141 [2022-03-15 15:51:43,726 INFO L226 Difference]: Without dead ends: 137 [2022-03-15 15:51:43,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:43,726 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:43,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-03-15 15:51:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-15 15:51:43,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-03-15 15:51:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.5338345864661656) internal successors, (337), 133 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 337 transitions. [2022-03-15 15:51:43,728 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 337 transitions. Word has length 17 [2022-03-15 15:51:43,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:43,728 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 337 transitions. [2022-03-15 15:51:43,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:43,728 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 337 transitions. [2022-03-15 15:51:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:43,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:43,729 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:43,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:43,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:43,946 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1384459305, now seen corresponding path program 120 times [2022-03-15 15:51:43,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:43,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182753309] [2022-03-15 15:51:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:43,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:44,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:44,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182753309] [2022-03-15 15:51:44,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182753309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:44,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469574149] [2022-03-15 15:51:44,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:44,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:44,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:44,006 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) [2022-03-15 15:51:44,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 15:51:44,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:51:44,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:44,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:44,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:44,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:44,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:51:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:44,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469574149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:44,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:44,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:44,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878025286] [2022-03-15 15:51:44,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:44,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:44,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:44,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:44,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:44,283 INFO L87 Difference]: Start difference. First operand 134 states and 337 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:44,359 INFO L93 Difference]: Finished difference Result 151 states and 365 transitions. [2022-03-15 15:51:44,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:51:44,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:44,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:44,359 INFO L225 Difference]: With dead ends: 151 [2022-03-15 15:51:44,359 INFO L226 Difference]: Without dead ends: 151 [2022-03-15 15:51:44,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:44,360 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:44,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 59 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 225 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-03-15 15:51:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-15 15:51:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 130. [2022-03-15 15:51:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.503875968992248) internal successors, (323), 129 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) [2022-03-15 15:51:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 323 transitions. [2022-03-15 15:51:44,361 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 323 transitions. Word has length 17 [2022-03-15 15:51:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:44,361 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 323 transitions. [2022-03-15 15:51:44,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:44,361 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 323 transitions. [2022-03-15 15:51:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:44,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:44,362 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:44,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:44,578 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,SelfDestructingSolverStorable133 [2022-03-15 15:51:44,578 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:44,579 INFO L85 PathProgramCache]: Analyzing trace with hash -193641751, now seen corresponding path program 121 times [2022-03-15 15:51:44,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:44,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567729954] [2022-03-15 15:51:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:44,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:44,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:44,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567729954] [2022-03-15 15:51:44,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567729954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:44,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212836784] [2022-03-15 15:51:44,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:44,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:44,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:44,676 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) [2022-03-15 15:51:44,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 15:51:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:44,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:44,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:44,902 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-03-15 15:51:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:44,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:45,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:45,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:45,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212836784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:45,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:45,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:51:45,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141857876] [2022-03-15 15:51:45,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:45,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:51:45,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:51:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:45,100 INFO L87 Difference]: Start difference. First operand 130 states and 323 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:45,182 INFO L93 Difference]: Finished difference Result 144 states and 349 transitions. [2022-03-15 15:51:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:45,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:45,183 INFO L225 Difference]: With dead ends: 144 [2022-03-15 15:51:45,183 INFO L226 Difference]: Without dead ends: 141 [2022-03-15 15:51:45,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:51:45,183 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:45,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 61 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 129 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-03-15 15:51:45,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-15 15:51:45,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2022-03-15 15:51:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.488721804511278) internal successors, (331), 133 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:45,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 331 transitions. [2022-03-15 15:51:45,185 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 331 transitions. Word has length 17 [2022-03-15 15:51:45,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:45,185 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 331 transitions. [2022-03-15 15:51:45,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 331 transitions. [2022-03-15 15:51:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:45,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:45,186 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:45,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:45,402 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,SelfDestructingSolverStorable134 [2022-03-15 15:51:45,403 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:45,403 INFO L85 PathProgramCache]: Analyzing trace with hash 440706665, now seen corresponding path program 122 times [2022-03-15 15:51:45,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:45,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962945810] [2022-03-15 15:51:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:45,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:45,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:45,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962945810] [2022-03-15 15:51:45,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962945810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:45,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25468305] [2022-03-15 15:51:45,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:45,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:45,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:45,507 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) [2022-03-15 15:51:45,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 15:51:45,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:45,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:45,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:45,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:45,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:45,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-03-15 15:51:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:45,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:45,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:45,902 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 53 treesize of output 47 [2022-03-15 15:51:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:45,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25468305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:45,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:45,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:51:45,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269458611] [2022-03-15 15:51:45,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:45,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:51:45,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:45,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:51:45,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:45,994 INFO L87 Difference]: Start difference. First operand 134 states and 331 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:46,116 INFO L93 Difference]: Finished difference Result 165 states and 379 transitions. [2022-03-15 15:51:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:46,117 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:46,117 INFO L225 Difference]: With dead ends: 165 [2022-03-15 15:51:46,117 INFO L226 Difference]: Without dead ends: 165 [2022-03-15 15:51:46,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:46,117 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:46,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 87 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-15 15:51:46,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2022-03-15 15:51:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.4656488549618323) internal successors, (323), 131 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) [2022-03-15 15:51:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 323 transitions. [2022-03-15 15:51:46,119 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 323 transitions. Word has length 17 [2022-03-15 15:51:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:46,119 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 323 transitions. [2022-03-15 15:51:46,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 323 transitions. [2022-03-15 15:51:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:46,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:46,120 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:46,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-15 15:51:46,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:46,320 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:46,320 INFO L85 PathProgramCache]: Analyzing trace with hash -776144757, now seen corresponding path program 123 times [2022-03-15 15:51:46,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:46,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158524318] [2022-03-15 15:51:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:46,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:46,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:46,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158524318] [2022-03-15 15:51:46,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158524318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:46,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004638491] [2022-03-15 15:51:46,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:46,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:46,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:46,436 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) [2022-03-15 15:51:46,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 15:51:46,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:51:46,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:46,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:51:46,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:46,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:46,685 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 72 treesize of output 64 [2022-03-15 15:51:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:46,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:46,977 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:51:46,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:51:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:47,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004638491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:47,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:47,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-03-15 15:51:47,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296424556] [2022-03-15 15:51:47,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:47,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:51:47,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:47,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:51:47,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:51:47,050 INFO L87 Difference]: Start difference. First operand 132 states and 323 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:48,285 INFO L93 Difference]: Finished difference Result 308 states and 655 transitions. [2022-03-15 15:51:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 15:51:48,285 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:48,291 INFO L225 Difference]: With dead ends: 308 [2022-03-15 15:51:48,291 INFO L226 Difference]: Without dead ends: 302 [2022-03-15 15:51:48,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 15:51:48,292 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 205 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:48,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 210 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 850 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2022-03-15 15:51:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-15 15:51:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 162. [2022-03-15 15:51:48,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.5217391304347827) internal successors, (406), 161 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 406 transitions. [2022-03-15 15:51:48,294 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 406 transitions. Word has length 17 [2022-03-15 15:51:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:48,294 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 406 transitions. [2022-03-15 15:51:48,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 406 transitions. [2022-03-15 15:51:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:48,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:48,295 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:48,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:48,507 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,SelfDestructingSolverStorable136 [2022-03-15 15:51:48,507 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:48,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:48,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1800823405, now seen corresponding path program 124 times [2022-03-15 15:51:48,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:48,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972832108] [2022-03-15 15:51:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:48,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:48,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:48,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972832108] [2022-03-15 15:51:48,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972832108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:48,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578490088] [2022-03-15 15:51:48,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:48,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:48,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:48,584 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) [2022-03-15 15:51:48,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 15:51:48,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:48,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:48,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:48,833 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-03-15 15:51:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:48,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:49,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:49,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:49,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578490088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:49,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:49,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:51:49,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892746606] [2022-03-15 15:51:49,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:49,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:51:49,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:49,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:51:49,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:49,046 INFO L87 Difference]: Start difference. First operand 162 states and 406 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:49,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:49,082 INFO L93 Difference]: Finished difference Result 167 states and 411 transitions. [2022-03-15 15:51:49,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:49,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:49,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:49,083 INFO L225 Difference]: With dead ends: 167 [2022-03-15 15:51:49,083 INFO L226 Difference]: Without dead ends: 167 [2022-03-15 15:51:49,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:49,083 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:49,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-03-15 15:51:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-15 15:51:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 156. [2022-03-15 15:51:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.52258064516129) internal successors, (391), 155 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 391 transitions. [2022-03-15 15:51:49,085 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 391 transitions. Word has length 17 [2022-03-15 15:51:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:49,085 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 391 transitions. [2022-03-15 15:51:49,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 391 transitions. [2022-03-15 15:51:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:49,086 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:49,086 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:49,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:49,299 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,SelfDestructingSolverStorable137 [2022-03-15 15:51:49,299 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:49,299 INFO L85 PathProgramCache]: Analyzing trace with hash -238289179, now seen corresponding path program 125 times [2022-03-15 15:51:49,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:49,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860131115] [2022-03-15 15:51:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:49,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:49,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:49,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860131115] [2022-03-15 15:51:49,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860131115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:49,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163142883] [2022-03-15 15:51:49,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:49,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:49,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:49,366 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) [2022-03-15 15:51:49,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 15:51:49,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:49,595 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 54 treesize of output 42 [2022-03-15 15:51:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:49,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:49,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:49,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:49,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163142883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:49,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:49,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:51:49,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308717810] [2022-03-15 15:51:49,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:49,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:51:49,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:49,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:51:49,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:49,759 INFO L87 Difference]: Start difference. First operand 156 states and 391 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:49,852 INFO L93 Difference]: Finished difference Result 162 states and 398 transitions. [2022-03-15 15:51:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:49,853 INFO L225 Difference]: With dead ends: 162 [2022-03-15 15:51:49,853 INFO L226 Difference]: Without dead ends: 158 [2022-03-15 15:51:49,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:49,853 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:49,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 75 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-15 15:51:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2022-03-15 15:51:49,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.5161290322580645) internal successors, (390), 155 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 390 transitions. [2022-03-15 15:51:49,856 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 390 transitions. Word has length 17 [2022-03-15 15:51:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:49,856 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 390 transitions. [2022-03-15 15:51:49,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 390 transitions. [2022-03-15 15:51:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:49,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:49,856 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:49,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:50,071 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,SelfDestructingSolverStorable138 [2022-03-15 15:51:50,072 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:50,072 INFO L85 PathProgramCache]: Analyzing trace with hash -345347355, now seen corresponding path program 126 times [2022-03-15 15:51:50,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:50,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522003978] [2022-03-15 15:51:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:50,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:50,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:50,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522003978] [2022-03-15 15:51:50,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522003978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:50,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569605623] [2022-03-15 15:51:50,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:50,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:50,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:50,136 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) [2022-03-15 15:51:50,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 15:51:50,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:51:50,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:50,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:50,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:50,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:50,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:50,381 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 31 treesize of output 29 [2022-03-15 15:51:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:50,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569605623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:50,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:50,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:51:50,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713711442] [2022-03-15 15:51:50,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:50,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:51:50,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:50,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:51:50,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:50,407 INFO L87 Difference]: Start difference. First operand 156 states and 390 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:50,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:50,508 INFO L93 Difference]: Finished difference Result 171 states and 420 transitions. [2022-03-15 15:51:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:50,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:50,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:50,508 INFO L225 Difference]: With dead ends: 171 [2022-03-15 15:51:50,508 INFO L226 Difference]: Without dead ends: 171 [2022-03-15 15:51:50,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:51:50,510 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:50,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 70 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-15 15:51:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2022-03-15 15:51:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.5256410256410255) internal successors, (394), 156 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 394 transitions. [2022-03-15 15:51:50,512 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 394 transitions. Word has length 17 [2022-03-15 15:51:50,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:50,512 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 394 transitions. [2022-03-15 15:51:50,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:50,512 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 394 transitions. [2022-03-15 15:51:50,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:50,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:50,512 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:50,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-15 15:51:50,728 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,SelfDestructingSolverStorable139 [2022-03-15 15:51:50,728 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:50,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash -744635445, now seen corresponding path program 127 times [2022-03-15 15:51:50,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:50,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020720937] [2022-03-15 15:51:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:50,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:50,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:50,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020720937] [2022-03-15 15:51:50,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020720937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:50,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175869773] [2022-03-15 15:51:50,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:50,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:50,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:50,824 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) [2022-03-15 15:51:50,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 15:51:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:50,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:50,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:51,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:51:51,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-03-15 15:51:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:51,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:51,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:51,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:51,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175869773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:51,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:51,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:51:51,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330844928] [2022-03-15 15:51:51,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:51,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:51:51,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:51:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:51,283 INFO L87 Difference]: Start difference. First operand 157 states and 394 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:51,386 INFO L93 Difference]: Finished difference Result 159 states and 395 transitions. [2022-03-15 15:51:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:51,387 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:51,387 INFO L225 Difference]: With dead ends: 159 [2022-03-15 15:51:51,387 INFO L226 Difference]: Without dead ends: 153 [2022-03-15 15:51:51,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:51,387 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:51,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 73 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 198 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-03-15 15:51:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-15 15:51:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2022-03-15 15:51:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.56) internal successors, (384), 150 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 384 transitions. [2022-03-15 15:51:51,389 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 384 transitions. Word has length 17 [2022-03-15 15:51:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:51,389 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 384 transitions. [2022-03-15 15:51:51,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 384 transitions. [2022-03-15 15:51:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:51,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:51,390 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:51,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:51,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:51,595 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:51,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1842835821, now seen corresponding path program 128 times [2022-03-15 15:51:51,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:51,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440352520] [2022-03-15 15:51:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:51,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:51,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:51,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440352520] [2022-03-15 15:51:51,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440352520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:51,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364843925] [2022-03-15 15:51:51,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:51,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:51,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:51,690 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) [2022-03-15 15:51:51,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 15:51:51,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:51,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:51,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:51,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:51,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:52,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:52,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:52,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364843925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:52,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:52,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:52,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233895440] [2022-03-15 15:51:52,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:52,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:52,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:52,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:52,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:52,048 INFO L87 Difference]: Start difference. First operand 151 states and 384 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:52,132 INFO L93 Difference]: Finished difference Result 168 states and 417 transitions. [2022-03-15 15:51:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:52,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:52,133 INFO L225 Difference]: With dead ends: 168 [2022-03-15 15:51:52,133 INFO L226 Difference]: Without dead ends: 168 [2022-03-15 15:51:52,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:52,133 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:52,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 69 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-15 15:51:52,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 150. [2022-03-15 15:51:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.557046979865772) internal successors, (381), 149 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 381 transitions. [2022-03-15 15:51:52,135 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 381 transitions. Word has length 17 [2022-03-15 15:51:52,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:52,135 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 381 transitions. [2022-03-15 15:51:52,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:52,135 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 381 transitions. [2022-03-15 15:51:52,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:52,135 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:52,135 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:52,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-15 15:51:52,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:52,336 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:52,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1288601019, now seen corresponding path program 129 times [2022-03-15 15:51:52,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:52,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609888658] [2022-03-15 15:51:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:52,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:52,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:52,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609888658] [2022-03-15 15:51:52,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609888658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:52,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289650285] [2022-03-15 15:51:52,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:52,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:52,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:52,408 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) [2022-03-15 15:51:52,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 15:51:52,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:51:52,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:52,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:52,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:52,598 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 54 treesize of output 42 [2022-03-15 15:51:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:52,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:52,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:52,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:52,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289650285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:52,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:52,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:52,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177384174] [2022-03-15 15:51:52,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:52,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:52,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:52,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:52,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:52,739 INFO L87 Difference]: Start difference. First operand 150 states and 381 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:52,834 INFO L93 Difference]: Finished difference Result 162 states and 398 transitions. [2022-03-15 15:51:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:52,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:52,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:52,835 INFO L225 Difference]: With dead ends: 162 [2022-03-15 15:51:52,835 INFO L226 Difference]: Without dead ends: 153 [2022-03-15 15:51:52,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:52,835 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:52,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 66 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-15 15:51:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2022-03-15 15:51:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.5503355704697985) internal successors, (380), 149 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 380 transitions. [2022-03-15 15:51:52,837 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 380 transitions. Word has length 17 [2022-03-15 15:51:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:52,837 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 380 transitions. [2022-03-15 15:51:52,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 380 transitions. [2022-03-15 15:51:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:52,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:52,838 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:52,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:53,038 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,SelfDestructingSolverStorable142 [2022-03-15 15:51:53,038 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:53,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1012072763, now seen corresponding path program 130 times [2022-03-15 15:51:53,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:53,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230810010] [2022-03-15 15:51:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:53,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:53,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:53,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230810010] [2022-03-15 15:51:53,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230810010] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:53,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195195383] [2022-03-15 15:51:53,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:53,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:53,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:53,108 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) [2022-03-15 15:51:53,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 15:51:53,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:53,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:53,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:53,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:53,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:53,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:53,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:53,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195195383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:53,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:53,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:51:53,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592248579] [2022-03-15 15:51:53,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:53,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:51:53,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:53,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:51:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:53,406 INFO L87 Difference]: Start difference. First operand 150 states and 380 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:53,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:53,497 INFO L93 Difference]: Finished difference Result 163 states and 407 transitions. [2022-03-15 15:51:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:53,498 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:53,498 INFO L225 Difference]: With dead ends: 163 [2022-03-15 15:51:53,498 INFO L226 Difference]: Without dead ends: 163 [2022-03-15 15:51:53,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:51:53,498 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:53,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 70 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-15 15:51:53,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 151. [2022-03-15 15:51:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.5533333333333332) internal successors, (383), 150 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 383 transitions. [2022-03-15 15:51:53,500 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 383 transitions. Word has length 17 [2022-03-15 15:51:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:53,500 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 383 transitions. [2022-03-15 15:51:53,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 383 transitions. [2022-03-15 15:51:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:53,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:53,501 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:53,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:53,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:53,717 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:53,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1880765377, now seen corresponding path program 131 times [2022-03-15 15:51:53,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:53,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123170975] [2022-03-15 15:51:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:53,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:53,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:53,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123170975] [2022-03-15 15:51:53,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123170975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:53,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803447180] [2022-03-15 15:51:53,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:53,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:53,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:53,838 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) [2022-03-15 15:51:53,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 15:51:53,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:53,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:53,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:53,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:54,080 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 54 treesize of output 42 [2022-03-15 15:51:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:54,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:54,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:54,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:54,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803447180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:54,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:54,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:51:54,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950795724] [2022-03-15 15:51:54,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:54,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:51:54,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:54,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:51:54,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:54,292 INFO L87 Difference]: Start difference. First operand 151 states and 383 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:54,423 INFO L93 Difference]: Finished difference Result 158 states and 393 transitions. [2022-03-15 15:51:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:54,423 INFO L225 Difference]: With dead ends: 158 [2022-03-15 15:51:54,423 INFO L226 Difference]: Without dead ends: 152 [2022-03-15 15:51:54,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:54,424 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:54,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-15 15:51:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-03-15 15:51:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.5496688741721854) internal successors, (385), 151 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:54,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 385 transitions. [2022-03-15 15:51:54,425 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 385 transitions. Word has length 17 [2022-03-15 15:51:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:54,425 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 385 transitions. [2022-03-15 15:51:54,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 385 transitions. [2022-03-15 15:51:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:54,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:54,426 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:54,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-15 15:51:54,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:54,626 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:54,627 INFO L85 PathProgramCache]: Analyzing trace with hash 604166335, now seen corresponding path program 132 times [2022-03-15 15:51:54,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:54,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210590492] [2022-03-15 15:51:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:54,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:54,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:54,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210590492] [2022-03-15 15:51:54,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210590492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:54,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241236030] [2022-03-15 15:51:54,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:54,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:54,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:54,730 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) [2022-03-15 15:51:54,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-15 15:51:54,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:51:54,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:54,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:54,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:54,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:55,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:55,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:55,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241236030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:55,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:55,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:51:55,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295819316] [2022-03-15 15:51:55,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:55,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:51:55,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:55,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:51:55,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:55,102 INFO L87 Difference]: Start difference. First operand 152 states and 385 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:55,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:55,180 INFO L93 Difference]: Finished difference Result 176 states and 433 transitions. [2022-03-15 15:51:55,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:55,180 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:55,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:55,180 INFO L225 Difference]: With dead ends: 176 [2022-03-15 15:51:55,181 INFO L226 Difference]: Without dead ends: 176 [2022-03-15 15:51:55,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:51:55,181 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:55,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 56 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:55,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-15 15:51:55,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 152. [2022-03-15 15:51:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.5496688741721854) internal successors, (385), 151 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 385 transitions. [2022-03-15 15:51:55,183 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 385 transitions. Word has length 17 [2022-03-15 15:51:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:55,183 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 385 transitions. [2022-03-15 15:51:55,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 385 transitions. [2022-03-15 15:51:55,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:55,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:55,183 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:55,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:55,399 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,SelfDestructingSolverStorable145 [2022-03-15 15:51:55,399 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:55,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash -181887685, now seen corresponding path program 133 times [2022-03-15 15:51:55,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:55,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000356687] [2022-03-15 15:51:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:55,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:55,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:55,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000356687] [2022-03-15 15:51:55,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000356687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:55,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151523606] [2022-03-15 15:51:55,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:55,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:55,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:55,453 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) [2022-03-15 15:51:55,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-15 15:51:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:55,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:55,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:55,631 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 75 treesize of output 59 [2022-03-15 15:51:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:55,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:55,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:55,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:51:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:55,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151523606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:55,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:55,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:51:55,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11551514] [2022-03-15 15:51:55,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:55,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:51:55,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:55,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:51:55,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:55,781 INFO L87 Difference]: Start difference. First operand 152 states and 385 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:55,900 INFO L93 Difference]: Finished difference Result 179 states and 430 transitions. [2022-03-15 15:51:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:51:55,900 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:55,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:55,900 INFO L225 Difference]: With dead ends: 179 [2022-03-15 15:51:55,901 INFO L226 Difference]: Without dead ends: 176 [2022-03-15 15:51:55,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:51:55,901 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:55,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 101 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-15 15:51:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 157. [2022-03-15 15:51:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.5448717948717947) internal successors, (397), 156 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 397 transitions. [2022-03-15 15:51:55,903 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 397 transitions. Word has length 17 [2022-03-15 15:51:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:55,903 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 397 transitions. [2022-03-15 15:51:55,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 397 transitions. [2022-03-15 15:51:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:55,903 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:55,903 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:55,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:56,119 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,SelfDestructingSolverStorable146 [2022-03-15 15:51:56,119 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:56,120 INFO L85 PathProgramCache]: Analyzing trace with hash 452460731, now seen corresponding path program 134 times [2022-03-15 15:51:56,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:56,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173118211] [2022-03-15 15:51:56,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:56,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:56,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:56,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173118211] [2022-03-15 15:51:56,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173118211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:56,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438445332] [2022-03-15 15:51:56,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:51:56,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:56,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:56,180 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) [2022-03-15 15:51:56,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-15 15:51:56,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:56,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:56,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:56,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:56,336 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 54 treesize of output 42 [2022-03-15 15:51:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:56,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:56,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:56,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:56,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438445332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:56,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:56,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:51:56,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538224509] [2022-03-15 15:51:56,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:56,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:51:56,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:51:56,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:56,461 INFO L87 Difference]: Start difference. First operand 157 states and 397 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:56,608 INFO L93 Difference]: Finished difference Result 197 states and 468 transitions. [2022-03-15 15:51:56,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:51:56,608 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:56,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:56,608 INFO L225 Difference]: With dead ends: 197 [2022-03-15 15:51:56,608 INFO L226 Difference]: Without dead ends: 197 [2022-03-15 15:51:56,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:51:56,609 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:56,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 124 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-15 15:51:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2022-03-15 15:51:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.5448717948717947) internal successors, (397), 156 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 397 transitions. [2022-03-15 15:51:56,611 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 397 transitions. Word has length 17 [2022-03-15 15:51:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:56,611 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 397 transitions. [2022-03-15 15:51:56,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:56,611 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 397 transitions. [2022-03-15 15:51:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:56,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:56,611 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:56,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:56,824 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,SelfDestructingSolverStorable147 [2022-03-15 15:51:56,824 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:56,824 INFO L85 PathProgramCache]: Analyzing trace with hash -764390691, now seen corresponding path program 135 times [2022-03-15 15:51:56,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:56,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352851212] [2022-03-15 15:51:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:56,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:56,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:56,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352851212] [2022-03-15 15:51:56,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352851212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:56,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517631065] [2022-03-15 15:51:56,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:51:56,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:56,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:56,902 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) [2022-03-15 15:51:56,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-15 15:51:57,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:51:57,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:57,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:57,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:57,151 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 54 treesize of output 42 [2022-03-15 15:51:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:57,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:57,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:57,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:51:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:57,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517631065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:57,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:57,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:51:57,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628649228] [2022-03-15 15:51:57,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:57,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:51:57,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:57,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:51:57,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:57,319 INFO L87 Difference]: Start difference. First operand 157 states and 397 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:57,412 INFO L93 Difference]: Finished difference Result 173 states and 424 transitions. [2022-03-15 15:51:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:57,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:57,413 INFO L225 Difference]: With dead ends: 173 [2022-03-15 15:51:57,413 INFO L226 Difference]: Without dead ends: 171 [2022-03-15 15:51:57,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:57,413 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:57,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 83 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:57,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-15 15:51:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2022-03-15 15:51:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.5384615384615383) internal successors, (396), 156 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 396 transitions. [2022-03-15 15:51:57,415 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 396 transitions. Word has length 17 [2022-03-15 15:51:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:57,415 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 396 transitions. [2022-03-15 15:51:57,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 396 transitions. [2022-03-15 15:51:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:57,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:57,415 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:57,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:57,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:57,625 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:57,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1812577471, now seen corresponding path program 136 times [2022-03-15 15:51:57,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:57,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119815039] [2022-03-15 15:51:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:57,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:57,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:57,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119815039] [2022-03-15 15:51:57,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119815039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:57,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266443511] [2022-03-15 15:51:57,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:51:57,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:57,737 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) [2022-03-15 15:51:57,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-15 15:51:57,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:51:57,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:57,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:57,980 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 75 treesize of output 59 [2022-03-15 15:51:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:58,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:58,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:58,124 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 53 treesize of output 47 [2022-03-15 15:51:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:58,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266443511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:58,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:58,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:51:58,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461590283] [2022-03-15 15:51:58,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:58,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:51:58,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:58,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:51:58,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:51:58,177 INFO L87 Difference]: Start difference. First operand 157 states and 396 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:58,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:58,244 INFO L93 Difference]: Finished difference Result 162 states and 405 transitions. [2022-03-15 15:51:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:58,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:58,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:58,245 INFO L225 Difference]: With dead ends: 162 [2022-03-15 15:51:58,245 INFO L226 Difference]: Without dead ends: 162 [2022-03-15 15:51:58,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:58,245 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:58,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 46 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-15 15:51:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 153. [2022-03-15 15:51:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.5460526315789473) internal successors, (387), 152 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 387 transitions. [2022-03-15 15:51:58,247 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 387 transitions. Word has length 17 [2022-03-15 15:51:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:58,247 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 387 transitions. [2022-03-15 15:51:58,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:51:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 387 transitions. [2022-03-15 15:51:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:58,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:58,248 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:58,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:58,471 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,SelfDestructingSolverStorable149 [2022-03-15 15:51:58,472 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:58,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1528403639, now seen corresponding path program 137 times [2022-03-15 15:51:58,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:58,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130270413] [2022-03-15 15:51:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:58,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:58,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130270413] [2022-03-15 15:51:58,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130270413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:58,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270299304] [2022-03-15 15:51:58,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:51:58,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:58,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:58,556 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) [2022-03-15 15:51:58,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-15 15:51:58,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:51:58,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:58,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:58,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:58,797 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 54 treesize of output 42 [2022-03-15 15:51:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:58,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:58,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:58,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:51:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:58,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270299304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:58,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:58,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:51:58,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972623763] [2022-03-15 15:51:58,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:58,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:51:58,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:58,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:51:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:51:58,904 INFO L87 Difference]: Start difference. First operand 153 states and 387 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:58,971 INFO L93 Difference]: Finished difference Result 160 states and 397 transitions. [2022-03-15 15:51:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:51:58,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:58,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:58,971 INFO L225 Difference]: With dead ends: 160 [2022-03-15 15:51:58,971 INFO L226 Difference]: Without dead ends: 154 [2022-03-15 15:51:58,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:51:58,974 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:58,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 53 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:51:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-15 15:51:58,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-03-15 15:51:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.542483660130719) internal successors, (389), 153 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2022-03-15 15:51:58,976 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 17 [2022-03-15 15:51:58,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:58,976 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2022-03-15 15:51:58,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:51:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2022-03-15 15:51:58,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:58,977 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:58,977 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:58,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:59,188 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,SelfDestructingSolverStorable150 [2022-03-15 15:51:59,188 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:59,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:59,188 INFO L85 PathProgramCache]: Analyzing trace with hash -281631945, now seen corresponding path program 138 times [2022-03-15 15:51:59,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:59,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382038947] [2022-03-15 15:51:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:59,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:59,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:59,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382038947] [2022-03-15 15:51:59,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382038947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:59,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413877162] [2022-03-15 15:51:59,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:51:59,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:59,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:59,292 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) [2022-03-15 15:51:59,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-15 15:51:59,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:51:59,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:51:59,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:51:59,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:51:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:59,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:51:59,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:51:59,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:51:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:59,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413877162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:51:59,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:51:59,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:51:59,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389260214] [2022-03-15 15:51:59,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:51:59,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:51:59,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:51:59,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:51:59,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:51:59,546 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:51:59,678 INFO L93 Difference]: Finished difference Result 170 states and 421 transitions. [2022-03-15 15:51:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:51:59,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:51:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:51:59,678 INFO L225 Difference]: With dead ends: 170 [2022-03-15 15:51:59,678 INFO L226 Difference]: Without dead ends: 170 [2022-03-15 15:51:59,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:51:59,679 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:51:59,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 102 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:51:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-15 15:51:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2022-03-15 15:51:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.542483660130719) internal successors, (389), 153 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2022-03-15 15:51:59,681 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 17 [2022-03-15 15:51:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:51:59,681 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2022-03-15 15:51:59,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:51:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2022-03-15 15:51:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:51:59,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:51:59,681 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:51:59,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-15 15:51:59,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:59,898 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:51:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:51:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1067685965, now seen corresponding path program 139 times [2022-03-15 15:51:59,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:51:59,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353879025] [2022-03-15 15:51:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:51:59,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:51:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:51:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:51:59,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:51:59,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353879025] [2022-03-15 15:51:59,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353879025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:51:59,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127981669] [2022-03-15 15:51:59,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:51:59,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:51:59,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:51:59,978 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) [2022-03-15 15:51:59,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-15 15:52:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:00,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:00,145 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 72 treesize of output 56 [2022-03-15 15:52:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:00,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:00,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:00,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:00,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127981669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:00,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:00,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:00,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202531036] [2022-03-15 15:52:00,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:00,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:00,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:00,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:00,278 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:00,480 INFO L93 Difference]: Finished difference Result 181 states and 434 transitions. [2022-03-15 15:52:00,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:00,480 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:00,481 INFO L225 Difference]: With dead ends: 181 [2022-03-15 15:52:00,481 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 15:52:00,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:52:00,481 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:00,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 94 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 15:52:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 159. [2022-03-15 15:52:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.537974683544304) internal successors, (401), 158 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 401 transitions. [2022-03-15 15:52:00,483 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 401 transitions. Word has length 17 [2022-03-15 15:52:00,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:00,483 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 401 transitions. [2022-03-15 15:52:00,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 401 transitions. [2022-03-15 15:52:00,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:00,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:00,483 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:00,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:00,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:00,699 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:00,700 INFO L85 PathProgramCache]: Analyzing trace with hash -433337549, now seen corresponding path program 140 times [2022-03-15 15:52:00,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:00,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759256928] [2022-03-15 15:52:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:00,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:00,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:00,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759256928] [2022-03-15 15:52:00,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759256928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:00,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36701158] [2022-03-15 15:52:00,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:00,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:00,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:00,810 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) [2022-03-15 15:52:00,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-15 15:52:00,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:00,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:00,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:00,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:01,007 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 54 treesize of output 42 [2022-03-15 15:52:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:01,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:01,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:01,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:01,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36701158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:01,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:01,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:01,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124279814] [2022-03-15 15:52:01,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:01,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:01,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:01,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:01,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:01,183 INFO L87 Difference]: Start difference. First operand 159 states and 401 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:01,396 INFO L93 Difference]: Finished difference Result 199 states and 472 transitions. [2022-03-15 15:52:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:01,397 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:01,397 INFO L225 Difference]: With dead ends: 199 [2022-03-15 15:52:01,397 INFO L226 Difference]: Without dead ends: 199 [2022-03-15 15:52:01,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:52:01,398 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:01,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 96 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-15 15:52:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 159. [2022-03-15 15:52:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.537974683544304) internal successors, (401), 158 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 401 transitions. [2022-03-15 15:52:01,400 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 401 transitions. Word has length 17 [2022-03-15 15:52:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:01,400 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 401 transitions. [2022-03-15 15:52:01,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 401 transitions. [2022-03-15 15:52:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:01,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:01,400 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:01,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:01,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:01,601 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:01,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1650188971, now seen corresponding path program 141 times [2022-03-15 15:52:01,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:01,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350925462] [2022-03-15 15:52:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:01,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:01,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:01,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350925462] [2022-03-15 15:52:01,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350925462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:01,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952619451] [2022-03-15 15:52:01,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:01,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:01,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:01,714 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) [2022-03-15 15:52:01,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-15 15:52:01,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:52:01,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:01,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:01,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:01,912 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 54 treesize of output 42 [2022-03-15 15:52:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:01,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:02,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:02,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:02,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952619451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:02,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:02,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:02,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728039680] [2022-03-15 15:52:02,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:02,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:02,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:02,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:02,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:02,098 INFO L87 Difference]: Start difference. First operand 159 states and 401 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:02,274 INFO L93 Difference]: Finished difference Result 175 states and 428 transitions. [2022-03-15 15:52:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:52:02,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:02,275 INFO L225 Difference]: With dead ends: 175 [2022-03-15 15:52:02,275 INFO L226 Difference]: Without dead ends: 173 [2022-03-15 15:52:02,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:52:02,275 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:02,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-15 15:52:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 159. [2022-03-15 15:52:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.5316455696202533) internal successors, (400), 158 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 400 transitions. [2022-03-15 15:52:02,277 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 400 transitions. Word has length 17 [2022-03-15 15:52:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:02,277 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 400 transitions. [2022-03-15 15:52:02,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 400 transitions. [2022-03-15 15:52:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:02,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:02,278 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:02,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:02,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:02,478 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:02,478 INFO L85 PathProgramCache]: Analyzing trace with hash 926779191, now seen corresponding path program 142 times [2022-03-15 15:52:02,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:02,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288384950] [2022-03-15 15:52:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:02,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:02,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:02,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288384950] [2022-03-15 15:52:02,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288384950] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:02,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233577227] [2022-03-15 15:52:02,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:02,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:02,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:02,566 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) [2022-03-15 15:52:02,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-15 15:52:02,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:02,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:02,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:02,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:02,763 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 75 treesize of output 59 [2022-03-15 15:52:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:02,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:02,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:02,908 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 49 treesize of output 45 [2022-03-15 15:52:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:03,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233577227] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:03,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:03,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:03,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706819439] [2022-03-15 15:52:03,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:03,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:03,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:03,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:03,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:03,007 INFO L87 Difference]: Start difference. First operand 159 states and 400 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:03,107 INFO L93 Difference]: Finished difference Result 164 states and 409 transitions. [2022-03-15 15:52:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:03,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:03,108 INFO L225 Difference]: With dead ends: 164 [2022-03-15 15:52:03,108 INFO L226 Difference]: Without dead ends: 164 [2022-03-15 15:52:03,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:03,108 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:03,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-15 15:52:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2022-03-15 15:52:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.5460526315789473) internal successors, (387), 152 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 387 transitions. [2022-03-15 15:52:03,114 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 387 transitions. Word has length 17 [2022-03-15 15:52:03,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:03,114 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 387 transitions. [2022-03-15 15:52:03,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 387 transitions. [2022-03-15 15:52:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:03,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:03,115 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:03,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-15 15:52:03,315 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,SelfDestructingSolverStorable155 [2022-03-15 15:52:03,315 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:03,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1120497211, now seen corresponding path program 143 times [2022-03-15 15:52:03,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:03,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318382472] [2022-03-15 15:52:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:03,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:03,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:03,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318382472] [2022-03-15 15:52:03,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318382472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:03,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755707582] [2022-03-15 15:52:03,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:03,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:03,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:03,413 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) [2022-03-15 15:52:03,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-15 15:52:03,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:52:03,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:03,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:03,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:03,634 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 54 treesize of output 42 [2022-03-15 15:52:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:03,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:03,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:03,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:03,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755707582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:03,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:03,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:03,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476395067] [2022-03-15 15:52:03,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:03,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:03,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:03,838 INFO L87 Difference]: Start difference. First operand 153 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:03,998 INFO L93 Difference]: Finished difference Result 199 states and 475 transitions. [2022-03-15 15:52:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:03,999 INFO L225 Difference]: With dead ends: 199 [2022-03-15 15:52:03,999 INFO L226 Difference]: Without dead ends: 196 [2022-03-15 15:52:03,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:52:03,999 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:03,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 119 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-15 15:52:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 161. [2022-03-15 15:52:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.55625) internal successors, (409), 160 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 409 transitions. [2022-03-15 15:52:04,001 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 409 transitions. Word has length 17 [2022-03-15 15:52:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:04,001 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 409 transitions. [2022-03-15 15:52:04,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 409 transitions. [2022-03-15 15:52:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:04,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:04,001 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:04,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:04,202 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,SelfDestructingSolverStorable156 [2022-03-15 15:52:04,202 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:04,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:04,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1754845627, now seen corresponding path program 144 times [2022-03-15 15:52:04,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:04,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204908095] [2022-03-15 15:52:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:04,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:04,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:04,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204908095] [2022-03-15 15:52:04,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204908095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:04,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646206347] [2022-03-15 15:52:04,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:04,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:04,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:04,280 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) [2022-03-15 15:52:04,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-15 15:52:04,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:04,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:04,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:04,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:04,462 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 75 treesize of output 59 [2022-03-15 15:52:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:04,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:04,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:04,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:04,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646206347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:04,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:04,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:04,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050901865] [2022-03-15 15:52:04,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:04,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:04,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:04,647 INFO L87 Difference]: Start difference. First operand 161 states and 409 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:04,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:04,753 INFO L93 Difference]: Finished difference Result 187 states and 451 transitions. [2022-03-15 15:52:04,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:04,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:04,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:04,754 INFO L225 Difference]: With dead ends: 187 [2022-03-15 15:52:04,754 INFO L226 Difference]: Without dead ends: 187 [2022-03-15 15:52:04,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:04,755 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:04,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 81 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-15 15:52:04,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 161. [2022-03-15 15:52:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.55625) internal successors, (409), 160 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:04,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 409 transitions. [2022-03-15 15:52:04,757 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 409 transitions. Word has length 17 [2022-03-15 15:52:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:04,757 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 409 transitions. [2022-03-15 15:52:04,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:04,757 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 409 transitions. [2022-03-15 15:52:04,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:04,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:04,757 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:04,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:04,967 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,SelfDestructingSolverStorable157 [2022-03-15 15:52:04,967 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:04,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:04,967 INFO L85 PathProgramCache]: Analyzing trace with hash 537994205, now seen corresponding path program 145 times [2022-03-15 15:52:04,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:04,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476800301] [2022-03-15 15:52:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:04,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:05,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:05,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476800301] [2022-03-15 15:52:05,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476800301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:05,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984158500] [2022-03-15 15:52:05,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:05,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:05,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:05,044 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) [2022-03-15 15:52:05,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-15 15:52:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:05,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:05,265 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 72 treesize of output 56 [2022-03-15 15:52:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:05,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:05,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:05,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:05,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:05,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984158500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:05,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:05,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:05,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120805526] [2022-03-15 15:52:05,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:05,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:05,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:05,484 INFO L87 Difference]: Start difference. First operand 161 states and 409 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:05,612 INFO L93 Difference]: Finished difference Result 185 states and 444 transitions. [2022-03-15 15:52:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:52:05,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:05,612 INFO L225 Difference]: With dead ends: 185 [2022-03-15 15:52:05,612 INFO L226 Difference]: Without dead ends: 183 [2022-03-15 15:52:05,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:05,613 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:05,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 93 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:05,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-15 15:52:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 161. [2022-03-15 15:52:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.55) internal successors, (408), 160 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 408 transitions. [2022-03-15 15:52:05,615 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 408 transitions. Word has length 17 [2022-03-15 15:52:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:05,615 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 408 transitions. [2022-03-15 15:52:05,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 408 transitions. [2022-03-15 15:52:05,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:05,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:05,615 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:05,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:05,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:05,816 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1180004929, now seen corresponding path program 146 times [2022-03-15 15:52:05,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:05,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073210925] [2022-03-15 15:52:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:05,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:05,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:05,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073210925] [2022-03-15 15:52:05,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073210925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:05,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085828901] [2022-03-15 15:52:05,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:05,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:05,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:05,892 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) [2022-03-15 15:52:05,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-15 15:52:05,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:05,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:05,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:05,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:06,050 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 54 treesize of output 42 [2022-03-15 15:52:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:06,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:06,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:06,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:06,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085828901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:06,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:06,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:06,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991423365] [2022-03-15 15:52:06,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:06,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:06,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:06,162 INFO L87 Difference]: Start difference. First operand 161 states and 408 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:06,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:06,269 INFO L93 Difference]: Finished difference Result 200 states and 476 transitions. [2022-03-15 15:52:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:52:06,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:06,270 INFO L225 Difference]: With dead ends: 200 [2022-03-15 15:52:06,270 INFO L226 Difference]: Without dead ends: 200 [2022-03-15 15:52:06,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:52:06,270 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:06,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 95 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:06,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-15 15:52:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2022-03-15 15:52:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.5443037974683542) internal successors, (402), 158 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 402 transitions. [2022-03-15 15:52:06,272 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 402 transitions. Word has length 17 [2022-03-15 15:52:06,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:06,272 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 402 transitions. [2022-03-15 15:52:06,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 402 transitions. [2022-03-15 15:52:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:06,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:06,273 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:06,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:06,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:06,489 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:06,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:06,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1075849783, now seen corresponding path program 147 times [2022-03-15 15:52:06,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:06,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168334677] [2022-03-15 15:52:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:06,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:06,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:06,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:06,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168334677] [2022-03-15 15:52:06,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168334677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:06,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441894408] [2022-03-15 15:52:06,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:06,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:06,546 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) [2022-03-15 15:52:06,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-15 15:52:06,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:52:06,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:06,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:06,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:06,779 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 54 treesize of output 42 [2022-03-15 15:52:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:06,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:06,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:06,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:06,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441894408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:06,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:06,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:06,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245536389] [2022-03-15 15:52:06,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:06,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:06,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:06,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:06,925 INFO L87 Difference]: Start difference. First operand 159 states and 402 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:06,981 INFO L93 Difference]: Finished difference Result 163 states and 406 transitions. [2022-03-15 15:52:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:52:06,981 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:06,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:06,982 INFO L225 Difference]: With dead ends: 163 [2022-03-15 15:52:06,982 INFO L226 Difference]: Without dead ends: 159 [2022-03-15 15:52:06,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:06,982 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:06,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 73 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-03-15 15:52:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-15 15:52:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-03-15 15:52:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.537974683544304) internal successors, (401), 158 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 401 transitions. [2022-03-15 15:52:06,984 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 401 transitions. Word has length 17 [2022-03-15 15:52:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:06,984 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 401 transitions. [2022-03-15 15:52:06,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 401 transitions. [2022-03-15 15:52:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:06,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:06,984 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:07,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:07,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:07,198 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:07,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:07,198 INFO L85 PathProgramCache]: Analyzing trace with hash 968791607, now seen corresponding path program 148 times [2022-03-15 15:52:07,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:07,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896421106] [2022-03-15 15:52:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:07,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:07,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:07,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896421106] [2022-03-15 15:52:07,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896421106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:07,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246678106] [2022-03-15 15:52:07,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:07,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:07,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:07,270 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) [2022-03-15 15:52:07,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-15 15:52:07,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:07,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:07,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:07,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:07,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:07,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:07,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:07,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246678106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:07,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:07,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:52:07,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648584661] [2022-03-15 15:52:07,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:07,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:52:07,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:07,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:52:07,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:52:07,562 INFO L87 Difference]: Start difference. First operand 159 states and 401 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:07,634 INFO L93 Difference]: Finished difference Result 174 states and 431 transitions. [2022-03-15 15:52:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:07,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:07,644 INFO L225 Difference]: With dead ends: 174 [2022-03-15 15:52:07,644 INFO L226 Difference]: Without dead ends: 174 [2022-03-15 15:52:07,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:52:07,645 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:07,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 51 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:07,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-15 15:52:07,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 154. [2022-03-15 15:52:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.542483660130719) internal successors, (389), 153 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2022-03-15 15:52:07,646 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 17 [2022-03-15 15:52:07,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:07,647 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2022-03-15 15:52:07,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2022-03-15 15:52:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:07,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:07,647 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:07,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:07,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:07,856 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash -161539265, now seen corresponding path program 149 times [2022-03-15 15:52:07,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:07,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970244430] [2022-03-15 15:52:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:07,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:07,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:07,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970244430] [2022-03-15 15:52:07,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970244430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:07,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109036836] [2022-03-15 15:52:07,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:07,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:07,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:07,917 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) [2022-03-15 15:52:07,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-15 15:52:08,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:52:08,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:08,089 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 54 treesize of output 42 [2022-03-15 15:52:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:08,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:08,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:08,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:08,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109036836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:08,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:08,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:08,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341068221] [2022-03-15 15:52:08,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:08,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:08,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:08,206 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:52:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:08,291 INFO L93 Difference]: Finished difference Result 160 states and 396 transitions. [2022-03-15 15:52:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:52:08,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:08,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:08,291 INFO L225 Difference]: With dead ends: 160 [2022-03-15 15:52:08,291 INFO L226 Difference]: Without dead ends: 154 [2022-03-15 15:52:08,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:08,292 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:08,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 65 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-15 15:52:08,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-03-15 15:52:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.5359477124183005) internal successors, (388), 153 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 388 transitions. [2022-03-15 15:52:08,293 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 388 transitions. Word has length 17 [2022-03-15 15:52:08,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:08,294 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 388 transitions. [2022-03-15 15:52:08,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2022-03-15 15:52:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 388 transitions. [2022-03-15 15:52:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:08,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:08,294 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:08,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:08,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:08,497 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:08,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1971574849, now seen corresponding path program 150 times [2022-03-15 15:52:08,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:08,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157966897] [2022-03-15 15:52:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:08,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:08,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:08,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157966897] [2022-03-15 15:52:08,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157966897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:08,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17756410] [2022-03-15 15:52:08,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:08,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:08,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:08,613 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) [2022-03-15 15:52:08,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-15 15:52:08,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:52:08,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:08,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:08,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:08,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:08,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:08,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17756410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:08,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:08,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:52:08,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98554350] [2022-03-15 15:52:08,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:08,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:52:08,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:08,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:52:08,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:52:08,994 INFO L87 Difference]: Start difference. First operand 154 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:09,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:09,248 INFO L93 Difference]: Finished difference Result 172 states and 425 transitions. [2022-03-15 15:52:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:09,248 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:09,248 INFO L225 Difference]: With dead ends: 172 [2022-03-15 15:52:09,248 INFO L226 Difference]: Without dead ends: 172 [2022-03-15 15:52:09,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:52:09,249 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:09,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 83 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:52:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-15 15:52:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 154. [2022-03-15 15:52:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.5359477124183005) internal successors, (388), 153 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 388 transitions. [2022-03-15 15:52:09,251 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 388 transitions. Word has length 17 [2022-03-15 15:52:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:09,251 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 388 transitions. [2022-03-15 15:52:09,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 388 transitions. [2022-03-15 15:52:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:09,251 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:09,251 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:09,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:09,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:09,451 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1537338427, now seen corresponding path program 151 times [2022-03-15 15:52:09,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:09,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535870822] [2022-03-15 15:52:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:09,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:09,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:09,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535870822] [2022-03-15 15:52:09,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535870822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:09,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861245836] [2022-03-15 15:52:09,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:09,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:09,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:09,520 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) [2022-03-15 15:52:09,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-15 15:52:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:09,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:09,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:09,718 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 72 treesize of output 56 [2022-03-15 15:52:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:09,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:09,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:09,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:09,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861245836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:09,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:09,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:09,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23776608] [2022-03-15 15:52:09,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:09,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:09,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:09,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:09,904 INFO L87 Difference]: Start difference. First operand 154 states and 388 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:10,077 INFO L93 Difference]: Finished difference Result 178 states and 427 transitions. [2022-03-15 15:52:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:52:10,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:10,078 INFO L225 Difference]: With dead ends: 178 [2022-03-15 15:52:10,078 INFO L226 Difference]: Without dead ends: 175 [2022-03-15 15:52:10,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:52:10,078 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:10,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 78 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-15 15:52:10,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 159. [2022-03-15 15:52:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.5316455696202533) internal successors, (400), 158 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 400 transitions. [2022-03-15 15:52:10,080 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 400 transitions. Word has length 17 [2022-03-15 15:52:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:10,080 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 400 transitions. [2022-03-15 15:52:10,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 400 transitions. [2022-03-15 15:52:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:10,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:10,081 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:10,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:10,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:10,281 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2123280453, now seen corresponding path program 152 times [2022-03-15 15:52:10,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:10,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399931513] [2022-03-15 15:52:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:10,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:10,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:10,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399931513] [2022-03-15 15:52:10,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399931513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:10,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504923986] [2022-03-15 15:52:10,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:10,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:10,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:10,359 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) [2022-03-15 15:52:10,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-15 15:52:10,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:10,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:10,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:10,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:10,537 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 54 treesize of output 42 [2022-03-15 15:52:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:10,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:10,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:10,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:10,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504923986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:10,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:10,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:10,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004552104] [2022-03-15 15:52:10,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:10,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:10,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:10,693 INFO L87 Difference]: Start difference. First operand 159 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:10,850 INFO L93 Difference]: Finished difference Result 200 states and 473 transitions. [2022-03-15 15:52:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:10,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:10,851 INFO L225 Difference]: With dead ends: 200 [2022-03-15 15:52:10,851 INFO L226 Difference]: Without dead ends: 200 [2022-03-15 15:52:10,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:52:10,851 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:10,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 98 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-15 15:52:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2022-03-15 15:52:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.5316455696202533) internal successors, (400), 158 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 400 transitions. [2022-03-15 15:52:10,853 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 400 transitions. Word has length 17 [2022-03-15 15:52:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:10,853 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 400 transitions. [2022-03-15 15:52:10,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:10,853 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 400 transitions. [2022-03-15 15:52:10,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:10,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:10,853 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:10,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:11,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:11,063 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:11,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash 954835421, now seen corresponding path program 153 times [2022-03-15 15:52:11,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:11,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052770464] [2022-03-15 15:52:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:11,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:11,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:11,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052770464] [2022-03-15 15:52:11,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052770464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:11,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777490654] [2022-03-15 15:52:11,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:11,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:11,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:11,149 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) [2022-03-15 15:52:11,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-15 15:52:11,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:52:11,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:11,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 15:52:11,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:11,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:11,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 50 [2022-03-15 15:52:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:11,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:11,578 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:11,578 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 27 treesize of output 22 [2022-03-15 15:52:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:11,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777490654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:11,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:11,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-15 15:52:11,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896677166] [2022-03-15 15:52:11,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:11,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 15:52:11,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:11,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 15:52:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:52:11,630 INFO L87 Difference]: Start difference. First operand 159 states and 400 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:12,177 INFO L93 Difference]: Finished difference Result 277 states and 619 transitions. [2022-03-15 15:52:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:52:12,177 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:12,177 INFO L225 Difference]: With dead ends: 277 [2022-03-15 15:52:12,177 INFO L226 Difference]: Without dead ends: 275 [2022-03-15 15:52:12,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=418, Invalid=1474, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:52:12,178 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 150 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:12,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 176 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 497 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-03-15 15:52:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-15 15:52:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 174. [2022-03-15 15:52:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.601156069364162) internal successors, (450), 173 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 450 transitions. [2022-03-15 15:52:12,180 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 450 transitions. Word has length 17 [2022-03-15 15:52:12,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:12,180 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 450 transitions. [2022-03-15 15:52:12,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:12,180 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 450 transitions. [2022-03-15 15:52:12,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:12,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:12,181 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:12,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:12,396 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,SelfDestructingSolverStorable166 [2022-03-15 15:52:12,397 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:12,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash -763163713, now seen corresponding path program 154 times [2022-03-15 15:52:12,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:12,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620421928] [2022-03-15 15:52:12,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:12,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:12,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:12,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620421928] [2022-03-15 15:52:12,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620421928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:12,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203815539] [2022-03-15 15:52:12,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:12,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:12,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:12,508 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) [2022-03-15 15:52:12,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-15 15:52:12,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:12,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:12,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:12,704 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 75 treesize of output 59 [2022-03-15 15:52:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:12,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:12,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:12,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:12,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203815539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:12,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:12,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:12,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433079189] [2022-03-15 15:52:12,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:12,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:12,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:12,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:12,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:12,883 INFO L87 Difference]: Start difference. First operand 174 states and 450 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:12,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:12,960 INFO L93 Difference]: Finished difference Result 175 states and 449 transitions. [2022-03-15 15:52:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:12,961 INFO L225 Difference]: With dead ends: 175 [2022-03-15 15:52:12,961 INFO L226 Difference]: Without dead ends: 175 [2022-03-15 15:52:12,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:52:12,963 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:12,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 50 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-15 15:52:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 167. [2022-03-15 15:52:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.608433734939759) internal successors, (433), 166 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 433 transitions. [2022-03-15 15:52:12,965 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 433 transitions. Word has length 17 [2022-03-15 15:52:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:12,965 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 433 transitions. [2022-03-15 15:52:12,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 433 transitions. [2022-03-15 15:52:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:12,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:12,965 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:12,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-15 15:52:13,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:13,172 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash -569445693, now seen corresponding path program 155 times [2022-03-15 15:52:13,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:13,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78883667] [2022-03-15 15:52:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:13,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:13,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78883667] [2022-03-15 15:52:13,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78883667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:13,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280104728] [2022-03-15 15:52:13,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:13,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:13,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:13,258 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) [2022-03-15 15:52:13,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-15 15:52:13,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:52:13,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:13,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:13,425 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 54 treesize of output 42 [2022-03-15 15:52:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:13,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:13,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:13,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:13,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280104728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:13,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:13,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:13,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230132246] [2022-03-15 15:52:13,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:13,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:13,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:13,558 INFO L87 Difference]: Start difference. First operand 167 states and 433 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:13,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:13,687 INFO L93 Difference]: Finished difference Result 212 states and 523 transitions. [2022-03-15 15:52:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:13,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:13,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:13,688 INFO L225 Difference]: With dead ends: 212 [2022-03-15 15:52:13,688 INFO L226 Difference]: Without dead ends: 209 [2022-03-15 15:52:13,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:52:13,688 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:13,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 100 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:13,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-15 15:52:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 176. [2022-03-15 15:52:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.6285714285714286) internal successors, (460), 175 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 460 transitions. [2022-03-15 15:52:13,703 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 460 transitions. Word has length 17 [2022-03-15 15:52:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:13,704 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 460 transitions. [2022-03-15 15:52:13,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 460 transitions. [2022-03-15 15:52:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:13,704 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:13,704 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:13,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:13,939 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,SelfDestructingSolverStorable168 [2022-03-15 15:52:13,939 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:13,940 INFO L85 PathProgramCache]: Analyzing trace with hash 64902723, now seen corresponding path program 156 times [2022-03-15 15:52:13,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:13,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758900914] [2022-03-15 15:52:13,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:13,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:13,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:13,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758900914] [2022-03-15 15:52:13,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758900914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:13,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772169250] [2022-03-15 15:52:13,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:13,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:13,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:13,992 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) [2022-03-15 15:52:13,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-15 15:52:14,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:52:14,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:14,203 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 75 treesize of output 59 [2022-03-15 15:52:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:14,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:14,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:14,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:14,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772169250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:14,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:14,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:14,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047562822] [2022-03-15 15:52:14,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:14,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:14,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:14,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:14,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:14,371 INFO L87 Difference]: Start difference. First operand 176 states and 460 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:14,491 INFO L93 Difference]: Finished difference Result 200 states and 498 transitions. [2022-03-15 15:52:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:14,492 INFO L225 Difference]: With dead ends: 200 [2022-03-15 15:52:14,492 INFO L226 Difference]: Without dead ends: 200 [2022-03-15 15:52:14,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:14,492 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:14,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 70 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-15 15:52:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 176. [2022-03-15 15:52:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.6285714285714286) internal successors, (460), 175 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 460 transitions. [2022-03-15 15:52:14,494 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 460 transitions. Word has length 17 [2022-03-15 15:52:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:14,494 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 460 transitions. [2022-03-15 15:52:14,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 460 transitions. [2022-03-15 15:52:14,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:14,495 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:14,495 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:14,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:14,699 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,SelfDestructingSolverStorable169 [2022-03-15 15:52:14,699 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:14,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1151948699, now seen corresponding path program 157 times [2022-03-15 15:52:14,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:14,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867847938] [2022-03-15 15:52:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:14,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:14,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:14,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867847938] [2022-03-15 15:52:14,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867847938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:14,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824367490] [2022-03-15 15:52:14,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:14,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:14,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:14,766 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) [2022-03-15 15:52:14,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-15 15:52:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:14,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:14,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:14,966 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 72 treesize of output 56 [2022-03-15 15:52:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:15,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:15,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:15,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:15,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824367490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:15,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:15,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:15,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390841365] [2022-03-15 15:52:15,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:15,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:15,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:15,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:15,116 INFO L87 Difference]: Start difference. First operand 176 states and 460 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:15,216 INFO L93 Difference]: Finished difference Result 202 states and 499 transitions. [2022-03-15 15:52:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:52:15,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:15,217 INFO L225 Difference]: With dead ends: 202 [2022-03-15 15:52:15,217 INFO L226 Difference]: Without dead ends: 200 [2022-03-15 15:52:15,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:52:15,217 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:15,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 120 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-15 15:52:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 176. [2022-03-15 15:52:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.6228571428571428) internal successors, (459), 175 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 459 transitions. [2022-03-15 15:52:15,220 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 459 transitions. Word has length 17 [2022-03-15 15:52:15,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:15,220 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 459 transitions. [2022-03-15 15:52:15,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 459 transitions. [2022-03-15 15:52:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:15,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:15,220 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:15,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:15,436 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,SelfDestructingSolverStorable170 [2022-03-15 15:52:15,437 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:15,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:15,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1425019463, now seen corresponding path program 158 times [2022-03-15 15:52:15,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:15,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119324973] [2022-03-15 15:52:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:15,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:15,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:15,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119324973] [2022-03-15 15:52:15,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119324973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:15,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694540398] [2022-03-15 15:52:15,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:15,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:15,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:15,501 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) [2022-03-15 15:52:15,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-15 15:52:15,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:15,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:15,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:15,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:15,667 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 54 treesize of output 42 [2022-03-15 15:52:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:15,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:15,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:15,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:15,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694540398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:15,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:15,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:15,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554561354] [2022-03-15 15:52:15,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:15,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:15,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:15,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:15,792 INFO L87 Difference]: Start difference. First operand 176 states and 459 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:15,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:15,922 INFO L93 Difference]: Finished difference Result 213 states and 522 transitions. [2022-03-15 15:52:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:52:15,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:15,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:15,922 INFO L225 Difference]: With dead ends: 213 [2022-03-15 15:52:15,922 INFO L226 Difference]: Without dead ends: 213 [2022-03-15 15:52:15,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:52:15,922 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:15,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 114 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-15 15:52:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 175. [2022-03-15 15:52:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.603448275862069) internal successors, (453), 174 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 453 transitions. [2022-03-15 15:52:15,925 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 453 transitions. Word has length 17 [2022-03-15 15:52:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:15,925 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 453 transitions. [2022-03-15 15:52:15,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 453 transitions. [2022-03-15 15:52:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:15,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:15,925 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:15,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:16,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:16,140 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash -614093121, now seen corresponding path program 159 times [2022-03-15 15:52:16,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:16,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610341361] [2022-03-15 15:52:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:16,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:16,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:16,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610341361] [2022-03-15 15:52:16,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610341361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:16,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440018943] [2022-03-15 15:52:16,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:16,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:16,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:16,195 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) [2022-03-15 15:52:16,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-15 15:52:16,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:52:16,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:16,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:16,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:16,409 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 54 treesize of output 42 [2022-03-15 15:52:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:16,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:16,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:16,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:16,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440018943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:16,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:16,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:16,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617788443] [2022-03-15 15:52:16,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:16,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:16,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:16,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:16,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:16,567 INFO L87 Difference]: Start difference. First operand 175 states and 453 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:16,628 INFO L93 Difference]: Finished difference Result 179 states and 457 transitions. [2022-03-15 15:52:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:16,629 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:16,629 INFO L225 Difference]: With dead ends: 179 [2022-03-15 15:52:16,629 INFO L226 Difference]: Without dead ends: 175 [2022-03-15 15:52:16,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:52:16,630 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:16,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 159 Invalid, 0 Unknown, 3 Unchecked, 0.0s Time] [2022-03-15 15:52:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-15 15:52:16,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-03-15 15:52:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5977011494252875) internal successors, (452), 174 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 452 transitions. [2022-03-15 15:52:16,632 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 452 transitions. Word has length 17 [2022-03-15 15:52:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:16,633 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 452 transitions. [2022-03-15 15:52:16,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:16,633 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 452 transitions. [2022-03-15 15:52:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:16,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:16,633 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:16,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:16,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:16,849 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash -721151297, now seen corresponding path program 160 times [2022-03-15 15:52:16,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:16,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618120446] [2022-03-15 15:52:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:16,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:16,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:16,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618120446] [2022-03-15 15:52:16,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618120446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:16,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98129713] [2022-03-15 15:52:16,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:16,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:16,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:16,941 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) [2022-03-15 15:52:16,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-15 15:52:17,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:17,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:17,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:17,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:17,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:17,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:17,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:17,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98129713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:17,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:17,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:52:17,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592600109] [2022-03-15 15:52:17,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:17,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:52:17,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:17,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:52:17,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:52:17,320 INFO L87 Difference]: Start difference. First operand 175 states and 452 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:17,446 INFO L93 Difference]: Finished difference Result 191 states and 484 transitions. [2022-03-15 15:52:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:52:17,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:17,446 INFO L225 Difference]: With dead ends: 191 [2022-03-15 15:52:17,447 INFO L226 Difference]: Without dead ends: 191 [2022-03-15 15:52:17,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:52:17,447 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:17,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 79 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-15 15:52:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2022-03-15 15:52:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.5976331360946747) internal successors, (439), 169 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 439 transitions. [2022-03-15 15:52:17,449 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 439 transitions. Word has length 17 [2022-03-15 15:52:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:17,449 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 439 transitions. [2022-03-15 15:52:17,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 439 transitions. [2022-03-15 15:52:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:17,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:17,449 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:17,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:17,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:17,650 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:17,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:17,650 INFO L85 PathProgramCache]: Analyzing trace with hash 23112823, now seen corresponding path program 161 times [2022-03-15 15:52:17,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:17,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811671363] [2022-03-15 15:52:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:17,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:17,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811671363] [2022-03-15 15:52:17,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811671363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:17,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495682131] [2022-03-15 15:52:17,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:17,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:17,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:17,736 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) [2022-03-15 15:52:17,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-15 15:52:17,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:52:17,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:17,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:17,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:18,012 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 75 treesize of output 59 [2022-03-15 15:52:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:18,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:18,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:18,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:52:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:18,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495682131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:18,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:18,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:52:18,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725750467] [2022-03-15 15:52:18,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:18,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:52:18,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:18,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:52:18,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:52:18,248 INFO L87 Difference]: Start difference. First operand 170 states and 439 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:52:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:18,363 INFO L93 Difference]: Finished difference Result 205 states and 502 transitions. [2022-03-15 15:52:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:18,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:18,364 INFO L225 Difference]: With dead ends: 205 [2022-03-15 15:52:18,364 INFO L226 Difference]: Without dead ends: 205 [2022-03-15 15:52:18,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:18,364 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:18,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 106 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:18,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-15 15:52:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 173. [2022-03-15 15:52:18,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.5988372093023258) internal successors, (447), 172 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 447 transitions. [2022-03-15 15:52:18,366 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 447 transitions. Word has length 17 [2022-03-15 15:52:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:18,366 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 447 transitions. [2022-03-15 15:52:18,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:52:18,366 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 447 transitions. [2022-03-15 15:52:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:18,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:18,367 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:18,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:18,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:18,567 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1383229563, now seen corresponding path program 162 times [2022-03-15 15:52:18,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:18,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001000837] [2022-03-15 15:52:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:18,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:18,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001000837] [2022-03-15 15:52:18,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001000837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:18,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870007695] [2022-03-15 15:52:18,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:18,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:18,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:18,669 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) [2022-03-15 15:52:18,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-15 15:52:18,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:52:18,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:18,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:18,958 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 54 treesize of output 42 [2022-03-15 15:52:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:19,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:19,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:19,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:52:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:19,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870007695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:19,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:19,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:19,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316898329] [2022-03-15 15:52:19,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:19,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:19,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:19,183 INFO L87 Difference]: Start difference. First operand 173 states and 447 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:19,425 INFO L93 Difference]: Finished difference Result 229 states and 552 transitions. [2022-03-15 15:52:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:52:19,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:19,426 INFO L225 Difference]: With dead ends: 229 [2022-03-15 15:52:19,426 INFO L226 Difference]: Without dead ends: 229 [2022-03-15 15:52:19,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:52:19,426 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:19,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 164 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-15 15:52:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 179. [2022-03-15 15:52:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.6235955056179776) internal successors, (467), 178 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 467 transitions. [2022-03-15 15:52:19,428 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 467 transitions. Word has length 17 [2022-03-15 15:52:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:19,428 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 467 transitions. [2022-03-15 15:52:19,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 467 transitions. [2022-03-15 15:52:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:19,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:19,429 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:19,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-03-15 15:52:19,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:19,629 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1499891401, now seen corresponding path program 163 times [2022-03-15 15:52:19,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:19,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744218216] [2022-03-15 15:52:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:19,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:19,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:19,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744218216] [2022-03-15 15:52:19,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744218216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:19,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162022735] [2022-03-15 15:52:19,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:19,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:19,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:19,700 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) [2022-03-15 15:52:19,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-15 15:52:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:19,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:19,941 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 54 treesize of output 42 [2022-03-15 15:52:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:19,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:20,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:20,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:52:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:20,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162022735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:20,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:20,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:52:20,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320883137] [2022-03-15 15:52:20,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:20,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:52:20,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:52:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:52:20,114 INFO L87 Difference]: Start difference. First operand 179 states and 467 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:52:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:20,243 INFO L93 Difference]: Finished difference Result 187 states and 477 transitions. [2022-03-15 15:52:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:20,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:20,244 INFO L225 Difference]: With dead ends: 187 [2022-03-15 15:52:20,244 INFO L226 Difference]: Without dead ends: 183 [2022-03-15 15:52:20,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:52:20,244 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:20,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 75 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-15 15:52:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2022-03-15 15:52:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.6179775280898876) internal successors, (466), 178 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 466 transitions. [2022-03-15 15:52:20,246 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 466 transitions. Word has length 17 [2022-03-15 15:52:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:20,246 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 466 transitions. [2022-03-15 15:52:20,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:52:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 466 transitions. [2022-03-15 15:52:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:20,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:20,247 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:20,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:20,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:20,459 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:20,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash -762941197, now seen corresponding path program 164 times [2022-03-15 15:52:20,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:20,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2607572] [2022-03-15 15:52:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:20,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:20,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:20,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2607572] [2022-03-15 15:52:20,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2607572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:20,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148866629] [2022-03-15 15:52:20,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:20,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:20,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:20,550 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) [2022-03-15 15:52:20,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-15 15:52:20,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:20,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:20,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:20,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:20,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:20,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:20,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:52:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:20,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148866629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:20,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:20,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:52:20,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031479774] [2022-03-15 15:52:20,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:20,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:52:20,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:20,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:52:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:52:20,973 INFO L87 Difference]: Start difference. First operand 179 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:21,110 INFO L93 Difference]: Finished difference Result 198 states and 502 transitions. [2022-03-15 15:52:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:21,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:21,110 INFO L225 Difference]: With dead ends: 198 [2022-03-15 15:52:21,110 INFO L226 Difference]: Without dead ends: 198 [2022-03-15 15:52:21,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:52:21,111 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:21,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 68 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-03-15 15:52:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 179. [2022-03-15 15:52:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.6179775280898876) internal successors, (466), 178 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 466 transitions. [2022-03-15 15:52:21,113 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 466 transitions. Word has length 17 [2022-03-15 15:52:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:21,113 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 466 transitions. [2022-03-15 15:52:21,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 466 transitions. [2022-03-15 15:52:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:21,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:21,113 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:21,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:21,330 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,SelfDestructingSolverStorable177 [2022-03-15 15:52:21,330 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:21,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:21,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2006237667, now seen corresponding path program 165 times [2022-03-15 15:52:21,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:21,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561515218] [2022-03-15 15:52:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:21,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:21,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:21,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561515218] [2022-03-15 15:52:21,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561515218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:21,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592835284] [2022-03-15 15:52:21,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:21,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:21,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:21,410 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) [2022-03-15 15:52:21,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-15 15:52:21,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:52:21,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:21,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:21,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:21,726 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 54 treesize of output 42 [2022-03-15 15:52:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:21,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:21,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:21,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:52:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:21,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592835284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:21,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:21,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:21,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775216797] [2022-03-15 15:52:21,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:21,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:21,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:21,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:21,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:21,927 INFO L87 Difference]: Start difference. First operand 179 states and 466 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:22,007 INFO L93 Difference]: Finished difference Result 185 states and 473 transitions. [2022-03-15 15:52:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:22,008 INFO L225 Difference]: With dead ends: 185 [2022-03-15 15:52:22,008 INFO L226 Difference]: Without dead ends: 179 [2022-03-15 15:52:22,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:22,009 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:22,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 89 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 226 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-03-15 15:52:22,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-15 15:52:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-03-15 15:52:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.6123595505617976) internal successors, (465), 178 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:22,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 465 transitions. [2022-03-15 15:52:22,012 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 465 transitions. Word has length 17 [2022-03-15 15:52:22,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:22,012 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 465 transitions. [2022-03-15 15:52:22,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:22,012 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 465 transitions. [2022-03-15 15:52:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:22,012 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:22,012 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:22,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:22,223 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,SelfDestructingSolverStorable178 [2022-03-15 15:52:22,223 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1425241979, now seen corresponding path program 166 times [2022-03-15 15:52:22,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:22,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797389546] [2022-03-15 15:52:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:22,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:22,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:22,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797389546] [2022-03-15 15:52:22,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797389546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:22,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571883775] [2022-03-15 15:52:22,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:22,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:22,309 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) [2022-03-15 15:52:22,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-15 15:52:22,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:22,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:22,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:22,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:22,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:22,655 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 31 treesize of output 29 [2022-03-15 15:52:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:22,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571883775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:22,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:22,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:22,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168112285] [2022-03-15 15:52:22,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:22,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:22,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:22,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:22,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:22,690 INFO L87 Difference]: Start difference. First operand 179 states and 465 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:22,758 INFO L93 Difference]: Finished difference Result 192 states and 487 transitions. [2022-03-15 15:52:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:22,759 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:22,759 INFO L225 Difference]: With dead ends: 192 [2022-03-15 15:52:22,759 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 15:52:22,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:22,759 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:22,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-03-15 15:52:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 15:52:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2022-03-15 15:52:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.5872093023255816) internal successors, (445), 172 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 445 transitions. [2022-03-15 15:52:22,761 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 445 transitions. Word has length 17 [2022-03-15 15:52:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:22,761 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 445 transitions. [2022-03-15 15:52:22,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 445 transitions. [2022-03-15 15:52:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:22,762 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:22,762 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:22,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-15 15:52:22,962 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,SelfDestructingSolverStorable179 [2022-03-15 15:52:22,962 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:22,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:22,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1250043401, now seen corresponding path program 167 times [2022-03-15 15:52:22,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:22,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865987286] [2022-03-15 15:52:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:22,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:23,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:23,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865987286] [2022-03-15 15:52:23,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865987286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:23,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214516597] [2022-03-15 15:52:23,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:23,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:23,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:23,085 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) [2022-03-15 15:52:23,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-15 15:52:23,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:52:23,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:23,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:23,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:23,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:23,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:23,451 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 27 treesize of output 27 [2022-03-15 15:52:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:23,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214516597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:23,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:23,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:52:23,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098348649] [2022-03-15 15:52:23,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:23,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:52:23,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:23,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:52:23,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:52:23,493 INFO L87 Difference]: Start difference. First operand 173 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:23,705 INFO L93 Difference]: Finished difference Result 202 states and 500 transitions. [2022-03-15 15:52:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:52:23,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:23,706 INFO L225 Difference]: With dead ends: 202 [2022-03-15 15:52:23,706 INFO L226 Difference]: Without dead ends: 202 [2022-03-15 15:52:23,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:52:23,706 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:23,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 88 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-15 15:52:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 173. [2022-03-15 15:52:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.5872093023255816) internal successors, (445), 172 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 445 transitions. [2022-03-15 15:52:23,708 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 445 transitions. Word has length 17 [2022-03-15 15:52:23,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:23,709 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 445 transitions. [2022-03-15 15:52:23,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 445 transitions. [2022-03-15 15:52:23,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:23,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:23,709 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:23,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:23,915 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,SelfDestructingSolverStorable180 [2022-03-15 15:52:23,915 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash 264404719, now seen corresponding path program 168 times [2022-03-15 15:52:23,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:23,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738456411] [2022-03-15 15:52:23,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:23,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:23,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:23,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738456411] [2022-03-15 15:52:23,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738456411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:23,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040023053] [2022-03-15 15:52:23,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:23,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:23,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:24,000 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) [2022-03-15 15:52:24,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-15 15:52:24,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:24,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:24,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:24,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:24,224 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 72 treesize of output 56 [2022-03-15 15:52:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:24,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:24,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:24,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:24,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040023053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:24,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:24,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:52:24,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723220248] [2022-03-15 15:52:24,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:24,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:52:24,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:24,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:52:24,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:52:24,454 INFO L87 Difference]: Start difference. First operand 173 states and 445 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:24,565 INFO L93 Difference]: Finished difference Result 206 states and 502 transitions. [2022-03-15 15:52:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:52:24,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:24,566 INFO L225 Difference]: With dead ends: 206 [2022-03-15 15:52:24,566 INFO L226 Difference]: Without dead ends: 203 [2022-03-15 15:52:24,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:52:24,566 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:24,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 80 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-15 15:52:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 178. [2022-03-15 15:52:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.5819209039548023) internal successors, (457), 177 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 457 transitions. [2022-03-15 15:52:24,568 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 457 transitions. Word has length 17 [2022-03-15 15:52:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:24,568 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 457 transitions. [2022-03-15 15:52:24,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 457 transitions. [2022-03-15 15:52:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:24,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:24,568 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:24,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-15 15:52:24,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:24,771 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:24,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:24,771 INFO L85 PathProgramCache]: Analyzing trace with hash 898753135, now seen corresponding path program 169 times [2022-03-15 15:52:24,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:24,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926933113] [2022-03-15 15:52:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:24,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:24,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:24,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926933113] [2022-03-15 15:52:24,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926933113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:24,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945595741] [2022-03-15 15:52:24,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:24,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:24,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:24,867 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) [2022-03-15 15:52:24,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-15 15:52:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:25,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:25,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:25,093 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 54 treesize of output 42 [2022-03-15 15:52:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:25,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:25,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:25,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:25,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945595741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:25,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:25,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:25,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939381788] [2022-03-15 15:52:25,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:25,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:25,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:25,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:25,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:25,224 INFO L87 Difference]: Start difference. First operand 178 states and 457 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:25,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:25,422 INFO L93 Difference]: Finished difference Result 226 states and 541 transitions. [2022-03-15 15:52:25,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:52:25,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:25,423 INFO L225 Difference]: With dead ends: 226 [2022-03-15 15:52:25,423 INFO L226 Difference]: Without dead ends: 226 [2022-03-15 15:52:25,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:52:25,423 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:25,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 147 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:25,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-15 15:52:25,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 178. [2022-03-15 15:52:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.5819209039548023) internal successors, (457), 177 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 457 transitions. [2022-03-15 15:52:25,431 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 457 transitions. Word has length 17 [2022-03-15 15:52:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:25,431 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 457 transitions. [2022-03-15 15:52:25,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 457 transitions. [2022-03-15 15:52:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:25,431 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:25,431 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:25,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:25,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:25,648 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:25,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash -318098287, now seen corresponding path program 170 times [2022-03-15 15:52:25,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:25,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92346324] [2022-03-15 15:52:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:25,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:25,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:25,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92346324] [2022-03-15 15:52:25,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92346324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:25,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864066441] [2022-03-15 15:52:25,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:25,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:25,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:25,739 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) [2022-03-15 15:52:25,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-15 15:52:25,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:25,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:25,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:25,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:25,975 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 54 treesize of output 42 [2022-03-15 15:52:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:26,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:26,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:26,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:26,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864066441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:26,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:26,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:26,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384965771] [2022-03-15 15:52:26,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:26,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:26,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:26,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:26,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:26,157 INFO L87 Difference]: Start difference. First operand 178 states and 457 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:26,339 INFO L93 Difference]: Finished difference Result 201 states and 496 transitions. [2022-03-15 15:52:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:52:26,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:26,340 INFO L225 Difference]: With dead ends: 201 [2022-03-15 15:52:26,340 INFO L226 Difference]: Without dead ends: 199 [2022-03-15 15:52:26,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:52:26,340 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:26,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 78 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-15 15:52:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2022-03-15 15:52:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.5762711864406778) internal successors, (456), 177 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2022-03-15 15:52:26,343 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 17 [2022-03-15 15:52:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:26,343 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2022-03-15 15:52:26,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2022-03-15 15:52:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:26,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:26,343 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:26,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-15 15:52:26,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:26,560 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:26,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:26,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2036097421, now seen corresponding path program 171 times [2022-03-15 15:52:26,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:26,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988100963] [2022-03-15 15:52:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:26,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:26,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:26,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988100963] [2022-03-15 15:52:26,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988100963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:26,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273922958] [2022-03-15 15:52:26,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:26,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:26,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:26,633 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) [2022-03-15 15:52:26,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-15 15:52:26,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:52:26,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:26,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:26,847 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 75 treesize of output 59 [2022-03-15 15:52:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:26,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:26,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:26,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:27,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273922958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:27,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:27,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:52:27,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647522275] [2022-03-15 15:52:27,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:27,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:52:27,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:27,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:52:27,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:52:27,029 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:27,154 INFO L93 Difference]: Finished difference Result 189 states and 477 transitions. [2022-03-15 15:52:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:52:27,154 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:27,155 INFO L225 Difference]: With dead ends: 189 [2022-03-15 15:52:27,155 INFO L226 Difference]: Without dead ends: 189 [2022-03-15 15:52:27,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:27,155 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:27,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 59 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-15 15:52:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 173. [2022-03-15 15:52:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.5872093023255816) internal successors, (445), 172 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 445 transitions. [2022-03-15 15:52:27,157 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 445 transitions. Word has length 17 [2022-03-15 15:52:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:27,157 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 445 transitions. [2022-03-15 15:52:27,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 445 transitions. [2022-03-15 15:52:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:27,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:27,158 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:27,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:27,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:27,358 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:27,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1842379401, now seen corresponding path program 172 times [2022-03-15 15:52:27,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:27,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126641294] [2022-03-15 15:52:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:27,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:27,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:27,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126641294] [2022-03-15 15:52:27,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126641294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:27,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884801889] [2022-03-15 15:52:27,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:27,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:27,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:27,470 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) [2022-03-15 15:52:27,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-15 15:52:27,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:27,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:27,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:27,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:27,658 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 54 treesize of output 42 [2022-03-15 15:52:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:27,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:27,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:27,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:27,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884801889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:27,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:27,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:27,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273227892] [2022-03-15 15:52:27,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:27,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:27,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:27,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:27,823 INFO L87 Difference]: Start difference. First operand 173 states and 445 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:27,932 INFO L93 Difference]: Finished difference Result 223 states and 541 transitions. [2022-03-15 15:52:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:52:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:27,933 INFO L225 Difference]: With dead ends: 223 [2022-03-15 15:52:27,933 INFO L226 Difference]: Without dead ends: 220 [2022-03-15 15:52:27,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:52:27,933 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:27,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 88 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-15 15:52:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 180. [2022-03-15 15:52:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.5921787709497206) internal successors, (464), 179 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 464 transitions. [2022-03-15 15:52:27,935 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 464 transitions. Word has length 17 [2022-03-15 15:52:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:27,935 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 464 transitions. [2022-03-15 15:52:27,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:27,935 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 464 transitions. [2022-03-15 15:52:27,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:27,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:27,936 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:27,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-15 15:52:28,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:28,144 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1208030985, now seen corresponding path program 173 times [2022-03-15 15:52:28,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:28,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489885837] [2022-03-15 15:52:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:28,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:28,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:28,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489885837] [2022-03-15 15:52:28,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489885837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:28,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354052781] [2022-03-15 15:52:28,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:28,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:28,244 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) [2022-03-15 15:52:28,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-15 15:52:28,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:52:28,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:28,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:28,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:28,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:28,512 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-03-15 15:52:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:28,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:28,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:28,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:28,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354052781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:28,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:28,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:28,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705726219] [2022-03-15 15:52:28,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:28,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:28,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:28,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:28,769 INFO L87 Difference]: Start difference. First operand 180 states and 464 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:28,925 INFO L93 Difference]: Finished difference Result 213 states and 520 transitions. [2022-03-15 15:52:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:52:28,925 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:28,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:28,926 INFO L225 Difference]: With dead ends: 213 [2022-03-15 15:52:28,926 INFO L226 Difference]: Without dead ends: 213 [2022-03-15 15:52:28,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:52:28,926 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:28,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 232 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-03-15 15:52:28,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-15 15:52:28,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 181. [2022-03-15 15:52:28,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.5944444444444446) internal successors, (467), 180 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 467 transitions. [2022-03-15 15:52:28,928 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 467 transitions. Word has length 17 [2022-03-15 15:52:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:28,928 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 467 transitions. [2022-03-15 15:52:28,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 467 transitions. [2022-03-15 15:52:28,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:28,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:28,929 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:28,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:29,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:29,129 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:29,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1870084889, now seen corresponding path program 174 times [2022-03-15 15:52:29,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:29,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926542901] [2022-03-15 15:52:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:29,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:29,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:29,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926542901] [2022-03-15 15:52:29,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926542901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:29,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861557346] [2022-03-15 15:52:29,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:29,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:29,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:29,245 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) [2022-03-15 15:52:29,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-15 15:52:29,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:29,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:29,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:29,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:29,497 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 72 treesize of output 56 [2022-03-15 15:52:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:29,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:29,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:29,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2022-03-15 15:52:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:29,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861557346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:29,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:29,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:52:29,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088166154] [2022-03-15 15:52:29,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:29,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:52:29,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:29,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:52:29,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:52:29,709 INFO L87 Difference]: Start difference. First operand 181 states and 467 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:29,912 INFO L93 Difference]: Finished difference Result 214 states and 519 transitions. [2022-03-15 15:52:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:52:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:29,912 INFO L225 Difference]: With dead ends: 214 [2022-03-15 15:52:29,912 INFO L226 Difference]: Without dead ends: 212 [2022-03-15 15:52:29,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:52:29,913 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:29,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:29,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-15 15:52:29,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 181. [2022-03-15 15:52:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.588888888888889) internal successors, (466), 180 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 466 transitions. [2022-03-15 15:52:29,915 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 466 transitions. Word has length 17 [2022-03-15 15:52:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:29,915 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 466 transitions. [2022-03-15 15:52:29,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 466 transitions. [2022-03-15 15:52:29,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:29,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:29,915 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:29,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:30,116 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,SelfDestructingSolverStorable187 [2022-03-15 15:52:30,116 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:30,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash 152085755, now seen corresponding path program 175 times [2022-03-15 15:52:30,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:30,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603686798] [2022-03-15 15:52:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:30,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:30,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:30,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603686798] [2022-03-15 15:52:30,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603686798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:30,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076722258] [2022-03-15 15:52:30,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:30,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:30,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:30,249 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) [2022-03-15 15:52:30,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-15 15:52:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:30,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:30,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:30,466 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 54 treesize of output 42 [2022-03-15 15:52:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:30,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:30,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:30,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:30,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076722258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:30,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:30,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:30,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934316256] [2022-03-15 15:52:30,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:30,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:30,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:30,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:30,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:30,656 INFO L87 Difference]: Start difference. First operand 181 states and 466 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:30,914 INFO L93 Difference]: Finished difference Result 225 states and 544 transitions. [2022-03-15 15:52:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:52:30,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:30,915 INFO L225 Difference]: With dead ends: 225 [2022-03-15 15:52:30,915 INFO L226 Difference]: Without dead ends: 225 [2022-03-15 15:52:30,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:52:30,915 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:30,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 109 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:52:30,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-15 15:52:30,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 180. [2022-03-15 15:52:30,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.5754189944134076) internal successors, (461), 179 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 461 transitions. [2022-03-15 15:52:30,917 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 461 transitions. Word has length 17 [2022-03-15 15:52:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:30,917 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 461 transitions. [2022-03-15 15:52:30,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 461 transitions. [2022-03-15 15:52:30,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:30,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:30,918 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:30,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:31,118 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,SelfDestructingSolverStorable188 [2022-03-15 15:52:31,118 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1887026829, now seen corresponding path program 176 times [2022-03-15 15:52:31,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:31,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394516280] [2022-03-15 15:52:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:31,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:31,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:31,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394516280] [2022-03-15 15:52:31,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394516280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:31,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644863891] [2022-03-15 15:52:31,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:31,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:31,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:31,204 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) [2022-03-15 15:52:31,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-15 15:52:31,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:31,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:31,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:31,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:31,427 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 54 treesize of output 42 [2022-03-15 15:52:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:31,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:31,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:31,549 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 49 treesize of output 45 [2022-03-15 15:52:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:31,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644863891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:31,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:31,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:52:31,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269323594] [2022-03-15 15:52:31,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:31,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:52:31,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:31,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:52:31,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:52:31,631 INFO L87 Difference]: Start difference. First operand 180 states and 461 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:31,775 INFO L93 Difference]: Finished difference Result 187 states and 470 transitions. [2022-03-15 15:52:31,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:31,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:31,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:31,775 INFO L225 Difference]: With dead ends: 187 [2022-03-15 15:52:31,775 INFO L226 Difference]: Without dead ends: 183 [2022-03-15 15:52:31,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:31,776 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:31,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 73 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:31,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-15 15:52:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2022-03-15 15:52:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.569832402234637) internal successors, (460), 179 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 460 transitions. [2022-03-15 15:52:31,778 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 460 transitions. Word has length 17 [2022-03-15 15:52:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:31,778 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 460 transitions. [2022-03-15 15:52:31,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 460 transitions. [2022-03-15 15:52:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:31,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:31,778 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:31,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:31,978 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,SelfDestructingSolverStorable189 [2022-03-15 15:52:31,979 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:31,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1994085005, now seen corresponding path program 177 times [2022-03-15 15:52:31,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:31,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721176248] [2022-03-15 15:52:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:31,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:32,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:32,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721176248] [2022-03-15 15:52:32,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721176248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:32,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230858045] [2022-03-15 15:52:32,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:32,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:32,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:32,099 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) [2022-03-15 15:52:32,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-15 15:52:32,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:52:32,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:32,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:32,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:32,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:32,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:32,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-03-15 15:52:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:32,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230858045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:32,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:32,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:52:32,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911183671] [2022-03-15 15:52:32,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:32,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:52:32,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:52:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:52:32,484 INFO L87 Difference]: Start difference. First operand 180 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:32,633 INFO L93 Difference]: Finished difference Result 201 states and 501 transitions. [2022-03-15 15:52:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:32,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:32,634 INFO L225 Difference]: With dead ends: 201 [2022-03-15 15:52:32,634 INFO L226 Difference]: Without dead ends: 201 [2022-03-15 15:52:32,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:52:32,634 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:32,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 81 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-15 15:52:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 175. [2022-03-15 15:52:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.574712643678161) internal successors, (448), 174 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 448 transitions. [2022-03-15 15:52:32,636 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 448 transitions. Word has length 17 [2022-03-15 15:52:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:32,636 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 448 transitions. [2022-03-15 15:52:32,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 448 transitions. [2022-03-15 15:52:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:32,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:32,637 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:32,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:32,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:32,837 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1249820885, now seen corresponding path program 178 times [2022-03-15 15:52:32,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:32,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80751616] [2022-03-15 15:52:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:32,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:32,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:32,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80751616] [2022-03-15 15:52:32,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80751616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:32,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059341344] [2022-03-15 15:52:32,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:32,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:32,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:32,927 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) [2022-03-15 15:52:32,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-15 15:52:33,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:33,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:33,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:33,176 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 72 treesize of output 56 [2022-03-15 15:52:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:33,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:33,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:33,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:52:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:33,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059341344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:33,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:33,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:33,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147048741] [2022-03-15 15:52:33,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:33,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:33,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:33,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:33,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:33,387 INFO L87 Difference]: Start difference. First operand 175 states and 448 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:33,508 INFO L93 Difference]: Finished difference Result 202 states and 487 transitions. [2022-03-15 15:52:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:33,509 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:33,509 INFO L225 Difference]: With dead ends: 202 [2022-03-15 15:52:33,509 INFO L226 Difference]: Without dead ends: 202 [2022-03-15 15:52:33,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:33,509 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:33,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 124 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-15 15:52:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 172. [2022-03-15 15:52:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.5497076023391814) internal successors, (436), 171 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2022-03-15 15:52:33,511 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 17 [2022-03-15 15:52:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:33,511 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2022-03-15 15:52:33,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2022-03-15 15:52:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:33,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:33,512 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:33,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:33,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:33,712 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:33,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:33,712 INFO L85 PathProgramCache]: Analyzing trace with hash 110295855, now seen corresponding path program 179 times [2022-03-15 15:52:33,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:33,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642355533] [2022-03-15 15:52:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:33,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:33,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:33,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642355533] [2022-03-15 15:52:33,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642355533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:33,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156173071] [2022-03-15 15:52:33,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:33,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:33,829 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) [2022-03-15 15:52:33,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-15 15:52:33,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:52:33,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:33,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:33,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:34,087 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 54 treesize of output 42 [2022-03-15 15:52:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:34,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:34,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:34,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:52:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:34,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156173071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:34,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:34,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:34,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748528861] [2022-03-15 15:52:34,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:34,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:34,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:34,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:34,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:34,304 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:34,531 INFO L93 Difference]: Finished difference Result 215 states and 508 transitions. [2022-03-15 15:52:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:52:34,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:34,532 INFO L225 Difference]: With dead ends: 215 [2022-03-15 15:52:34,532 INFO L226 Difference]: Without dead ends: 212 [2022-03-15 15:52:34,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:52:34,532 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:34,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 125 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-15 15:52:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 176. [2022-03-15 15:52:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.537142857142857) internal successors, (444), 175 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 444 transitions. [2022-03-15 15:52:34,535 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 444 transitions. Word has length 17 [2022-03-15 15:52:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:34,535 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 444 transitions. [2022-03-15 15:52:34,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 444 transitions. [2022-03-15 15:52:34,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:34,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:34,535 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:34,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:34,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:34,736 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1522142187, now seen corresponding path program 180 times [2022-03-15 15:52:34,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:34,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335649889] [2022-03-15 15:52:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:34,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:34,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:34,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335649889] [2022-03-15 15:52:34,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335649889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:34,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525180478] [2022-03-15 15:52:34,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:34,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:34,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:34,857 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) [2022-03-15 15:52:34,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-15 15:52:34,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:52:34,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:34,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:34,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:35,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:35,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-03-15 15:52:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:35,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:35,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:35,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2022-03-15 15:52:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:35,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525180478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:35,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:35,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:52:35,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862111587] [2022-03-15 15:52:35,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:35,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:52:35,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:35,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:52:35,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:52:35,454 INFO L87 Difference]: Start difference. First operand 176 states and 444 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:52:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:35,578 INFO L93 Difference]: Finished difference Result 183 states and 453 transitions. [2022-03-15 15:52:35,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:35,579 INFO L225 Difference]: With dead ends: 183 [2022-03-15 15:52:35,579 INFO L226 Difference]: Without dead ends: 179 [2022-03-15 15:52:35,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:52:35,579 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:35,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 96 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 185 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-03-15 15:52:35,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-15 15:52:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2022-03-15 15:52:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.5314285714285716) internal successors, (443), 175 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 443 transitions. [2022-03-15 15:52:35,581 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 443 transitions. Word has length 17 [2022-03-15 15:52:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:35,581 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 443 transitions. [2022-03-15 15:52:35,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:52:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 443 transitions. [2022-03-15 15:52:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:35,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:35,582 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:35,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:35,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:35,782 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash -2035874905, now seen corresponding path program 181 times [2022-03-15 15:52:35,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:35,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150432503] [2022-03-15 15:52:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:35,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:35,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150432503] [2022-03-15 15:52:35,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150432503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:35,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301631301] [2022-03-15 15:52:35,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:35,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:35,902 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) [2022-03-15 15:52:35,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-15 15:52:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:36,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:36,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:36,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:36,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:52:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:36,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301631301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:36,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:36,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-03-15 15:52:36,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810440508] [2022-03-15 15:52:36,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:36,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 15:52:36,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:36,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 15:52:36,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:52:36,295 INFO L87 Difference]: Start difference. First operand 176 states and 443 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:36,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:36,414 INFO L93 Difference]: Finished difference Result 198 states and 484 transitions. [2022-03-15 15:52:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:36,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:36,415 INFO L225 Difference]: With dead ends: 198 [2022-03-15 15:52:36,415 INFO L226 Difference]: Without dead ends: 198 [2022-03-15 15:52:36,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:52:36,415 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:36,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 94 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-03-15 15:52:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 175. [2022-03-15 15:52:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5344827586206895) internal successors, (441), 174 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 441 transitions. [2022-03-15 15:52:36,417 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 441 transitions. Word has length 17 [2022-03-15 15:52:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:36,417 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 441 transitions. [2022-03-15 15:52:36,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 441 transitions. [2022-03-15 15:52:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:36,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:36,417 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:36,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:36,635 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,SelfDestructingSolverStorable194 [2022-03-15 15:52:36,636 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1015795921, now seen corresponding path program 182 times [2022-03-15 15:52:36,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:36,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629190300] [2022-03-15 15:52:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:36,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:36,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:36,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629190300] [2022-03-15 15:52:36,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629190300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:36,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566419719] [2022-03-15 15:52:36,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:36,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:36,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:36,707 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) [2022-03-15 15:52:36,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-15 15:52:36,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:36,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:36,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:36,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:36,932 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 54 treesize of output 42 [2022-03-15 15:52:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:36,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:37,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:37,030 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 53 treesize of output 47 [2022-03-15 15:52:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:37,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566419719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:37,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:37,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:52:37,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895254521] [2022-03-15 15:52:37,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:37,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:52:37,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:52:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:52:37,108 INFO L87 Difference]: Start difference. First operand 175 states and 441 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:37,218 INFO L93 Difference]: Finished difference Result 184 states and 453 transitions. [2022-03-15 15:52:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:37,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:37,219 INFO L225 Difference]: With dead ends: 184 [2022-03-15 15:52:37,219 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 15:52:37,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:37,219 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:37,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 91 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 15:52:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2022-03-15 15:52:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.528735632183908) internal successors, (440), 174 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 440 transitions. [2022-03-15 15:52:37,221 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 440 transitions. Word has length 17 [2022-03-15 15:52:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:37,221 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 440 transitions. [2022-03-15 15:52:37,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 440 transitions. [2022-03-15 15:52:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:37,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:37,221 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:37,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-15 15:52:37,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:37,422 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:37,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:37,422 INFO L85 PathProgramCache]: Analyzing trace with hash 152308271, now seen corresponding path program 183 times [2022-03-15 15:52:37,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:37,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041737078] [2022-03-15 15:52:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:37,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:37,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:37,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041737078] [2022-03-15 15:52:37,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041737078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:37,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127380238] [2022-03-15 15:52:37,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:37,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:37,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:37,507 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) [2022-03-15 15:52:37,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-15 15:52:37,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:52:37,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:37,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:37,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:37,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:37,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:37,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 15:52:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:37,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127380238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:37,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:37,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-15 15:52:37,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206749536] [2022-03-15 15:52:37,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:37,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:52:37,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:52:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:52:37,901 INFO L87 Difference]: Start difference. First operand 175 states and 440 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:38,015 INFO L93 Difference]: Finished difference Result 188 states and 463 transitions. [2022-03-15 15:52:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:38,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:38,015 INFO L225 Difference]: With dead ends: 188 [2022-03-15 15:52:38,015 INFO L226 Difference]: Without dead ends: 188 [2022-03-15 15:52:38,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:52:38,016 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:38,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 83 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-15 15:52:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 165. [2022-03-15 15:52:38,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.524390243902439) internal successors, (414), 164 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 414 transitions. [2022-03-15 15:52:38,018 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 414 transitions. Word has length 17 [2022-03-15 15:52:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:38,018 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 414 transitions. [2022-03-15 15:52:38,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 414 transitions. [2022-03-15 15:52:38,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:38,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:38,018 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:38,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-15 15:52:38,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:38,219 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:38,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash -968124741, now seen corresponding path program 184 times [2022-03-15 15:52:38,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:38,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380931486] [2022-03-15 15:52:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:38,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:38,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:38,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380931486] [2022-03-15 15:52:38,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380931486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:38,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809741201] [2022-03-15 15:52:38,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:38,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:38,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:38,334 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) [2022-03-15 15:52:38,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-15 15:52:38,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:38,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:38,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:38,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:38,585 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 54 treesize of output 42 [2022-03-15 15:52:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:38,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:38,770 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:38,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-03-15 15:52:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:38,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809741201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:38,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:38,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:52:38,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590041332] [2022-03-15 15:52:38,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:38,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:52:38,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:52:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:52:38,779 INFO L87 Difference]: Start difference. First operand 165 states and 414 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:52:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:39,044 INFO L93 Difference]: Finished difference Result 209 states and 489 transitions. [2022-03-15 15:52:39,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:52:39,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:39,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:39,044 INFO L225 Difference]: With dead ends: 209 [2022-03-15 15:52:39,044 INFO L226 Difference]: Without dead ends: 206 [2022-03-15 15:52:39,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:52:39,045 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:39,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 119 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:52:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-15 15:52:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 171. [2022-03-15 15:52:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.523529411764706) internal successors, (429), 170 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 429 transitions. [2022-03-15 15:52:39,047 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 429 transitions. Word has length 17 [2022-03-15 15:52:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:39,047 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 429 transitions. [2022-03-15 15:52:39,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:52:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 429 transitions. [2022-03-15 15:52:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:39,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:39,047 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:39,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:39,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:39,248 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:39,248 INFO L85 PathProgramCache]: Analyzing trace with hash -333776325, now seen corresponding path program 185 times [2022-03-15 15:52:39,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:39,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329060673] [2022-03-15 15:52:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:39,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:39,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:39,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329060673] [2022-03-15 15:52:39,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329060673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:39,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136783800] [2022-03-15 15:52:39,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:39,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:39,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:39,331 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) [2022-03-15 15:52:39,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-15 15:52:39,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:52:39,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:39,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:39,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:39,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:39,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-03-15 15:52:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:39,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:39,860 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:39,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:52:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:39,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136783800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:39,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:39,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:39,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742876496] [2022-03-15 15:52:39,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:39,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:39,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:39,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:39,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:39,897 INFO L87 Difference]: Start difference. First operand 171 states and 429 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:39,952 INFO L93 Difference]: Finished difference Result 186 states and 458 transitions. [2022-03-15 15:52:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:39,952 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:39,953 INFO L225 Difference]: With dead ends: 186 [2022-03-15 15:52:39,953 INFO L226 Difference]: Without dead ends: 186 [2022-03-15 15:52:39,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:39,953 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:39,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 71 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-03-15 15:52:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-03-15 15:52:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 171. [2022-03-15 15:52:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.523529411764706) internal successors, (429), 170 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 429 transitions. [2022-03-15 15:52:39,956 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 429 transitions. Word has length 17 [2022-03-15 15:52:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:39,956 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 429 transitions. [2022-03-15 15:52:39,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 429 transitions. [2022-03-15 15:52:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:39,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:39,956 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:39,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:40,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:40,157 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:40,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1550627747, now seen corresponding path program 186 times [2022-03-15 15:52:40,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:40,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451861825] [2022-03-15 15:52:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:40,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:40,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:40,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451861825] [2022-03-15 15:52:40,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451861825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:40,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456451472] [2022-03-15 15:52:40,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:40,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:40,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:40,247 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) [2022-03-15 15:52:40,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-15 15:52:40,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:40,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:40,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:40,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:40,504 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 75 treesize of output 59 [2022-03-15 15:52:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:40,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:40,627 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:40,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:52:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:40,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456451472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:40,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:40,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:40,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224762161] [2022-03-15 15:52:40,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:40,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:40,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:40,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:40,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:40,653 INFO L87 Difference]: Start difference. First operand 171 states and 429 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:40,817 INFO L93 Difference]: Finished difference Result 200 states and 472 transitions. [2022-03-15 15:52:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 15:52:40,817 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:40,817 INFO L225 Difference]: With dead ends: 200 [2022-03-15 15:52:40,818 INFO L226 Difference]: Without dead ends: 198 [2022-03-15 15:52:40,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-15 15:52:40,818 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:40,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 120 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-03-15 15:52:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 171. [2022-03-15 15:52:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.5176470588235293) internal successors, (428), 170 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 428 transitions. [2022-03-15 15:52:40,820 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 428 transitions. Word has length 17 [2022-03-15 15:52:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:40,820 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 428 transitions. [2022-03-15 15:52:40,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 428 transitions. [2022-03-15 15:52:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:40,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:40,820 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:40,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:41,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:41,022 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:41,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:41,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1026340415, now seen corresponding path program 187 times [2022-03-15 15:52:41,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:41,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101238109] [2022-03-15 15:52:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:41,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:41,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:41,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101238109] [2022-03-15 15:52:41,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101238109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:41,118 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509380225] [2022-03-15 15:52:41,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:41,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:41,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:41,119 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) [2022-03-15 15:52:41,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-15 15:52:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:41,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:41,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:41,325 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 54 treesize of output 42 [2022-03-15 15:52:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:41,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:41,424 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:41,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-15 15:52:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:41,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509380225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:41,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:41,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-15 15:52:41,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294359960] [2022-03-15 15:52:41,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:41,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:52:41,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:41,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:52:41,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:52:41,429 INFO L87 Difference]: Start difference. First operand 171 states and 428 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:52:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:41,633 INFO L93 Difference]: Finished difference Result 211 states and 493 transitions. [2022-03-15 15:52:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:52:41,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:41,633 INFO L225 Difference]: With dead ends: 211 [2022-03-15 15:52:41,633 INFO L226 Difference]: Without dead ends: 211 [2022-03-15 15:52:41,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:52:41,633 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:41,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 112 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-15 15:52:41,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 169. [2022-03-15 15:52:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.511904761904762) internal successors, (422), 168 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 422 transitions. [2022-03-15 15:52:41,635 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 422 transitions. Word has length 17 [2022-03-15 15:52:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:41,635 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 422 transitions. [2022-03-15 15:52:41,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 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) [2022-03-15 15:52:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 422 transitions. [2022-03-15 15:52:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:41,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:41,636 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:41,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:41,852 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,SelfDestructingSolverStorable200 [2022-03-15 15:52:41,852 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:41,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1012772169, now seen corresponding path program 188 times [2022-03-15 15:52:41,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:41,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786254630] [2022-03-15 15:52:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:41,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:41,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:41,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786254630] [2022-03-15 15:52:41,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786254630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:41,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135549265] [2022-03-15 15:52:41,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:41,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:41,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:41,909 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) [2022-03-15 15:52:41,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-15 15:52:42,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:42,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:42,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:42,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:42,146 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 54 treesize of output 42 [2022-03-15 15:52:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:42,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:42,233 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:42,233 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 49 treesize of output 40 [2022-03-15 15:52:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:42,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135549265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:42,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:42,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-15 15:52:42,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176522089] [2022-03-15 15:52:42,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:42,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 15:52:42,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:42,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 15:52:42,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-15 15:52:42,249 INFO L87 Difference]: Start difference. First operand 169 states and 422 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:42,327 INFO L93 Difference]: Finished difference Result 196 states and 460 transitions. [2022-03-15 15:52:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:42,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:42,327 INFO L225 Difference]: With dead ends: 196 [2022-03-15 15:52:42,327 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 15:52:42,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:42,328 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:42,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 86 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 15:52:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2022-03-15 15:52:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.505952380952381) internal successors, (421), 168 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 421 transitions. [2022-03-15 15:52:42,330 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 421 transitions. Word has length 17 [2022-03-15 15:52:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:42,330 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 421 transitions. [2022-03-15 15:52:42,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:42,330 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 421 transitions. [2022-03-15 15:52:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:42,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:42,330 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:42,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:42,535 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,SelfDestructingSolverStorable201 [2022-03-15 15:52:42,535 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:42,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:42,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1119830345, now seen corresponding path program 189 times [2022-03-15 15:52:42,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:42,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014492473] [2022-03-15 15:52:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:42,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:42,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:42,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014492473] [2022-03-15 15:52:42,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014492473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:42,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615362822] [2022-03-15 15:52:42,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:42,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:42,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:42,617 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) [2022-03-15 15:52:42,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-15 15:52:42,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:52:42,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:42,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:42,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:42,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:42,938 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:42,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-15 15:52:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:42,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615362822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:42,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:42,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:42,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280482959] [2022-03-15 15:52:42,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:42,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:42,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:42,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:42,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:42,944 INFO L87 Difference]: Start difference. First operand 169 states and 421 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:43,093 INFO L93 Difference]: Finished difference Result 197 states and 472 transitions. [2022-03-15 15:52:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 15:52:43,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:43,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:43,094 INFO L225 Difference]: With dead ends: 197 [2022-03-15 15:52:43,094 INFO L226 Difference]: Without dead ends: 197 [2022-03-15 15:52:43,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:52:43,094 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:43,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 73 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-15 15:52:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 168. [2022-03-15 15:52:43,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.5089820359281436) internal successors, (419), 167 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 419 transitions. [2022-03-15 15:52:43,096 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 419 transitions. Word has length 17 [2022-03-15 15:52:43,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:43,096 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 419 transitions. [2022-03-15 15:52:43,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 419 transitions. [2022-03-15 15:52:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:43,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:43,097 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:43,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-03-15 15:52:43,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-15 15:52:43,299 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:43,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1519118435, now seen corresponding path program 190 times [2022-03-15 15:52:43,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:43,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352234894] [2022-03-15 15:52:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:43,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:43,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:43,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352234894] [2022-03-15 15:52:43,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352234894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:43,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306667423] [2022-03-15 15:52:43,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:43,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:43,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:43,376 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) [2022-03-15 15:52:43,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-15 15:52:43,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:43,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:43,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:43,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:43,631 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 54 treesize of output 42 [2022-03-15 15:52:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:43,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:43,726 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:43,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:52:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:43,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306667423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:43,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:43,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-15 15:52:43,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740307460] [2022-03-15 15:52:43,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:43,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 15:52:43,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:43,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 15:52:43,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:52:43,749 INFO L87 Difference]: Start difference. First operand 168 states and 419 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:43,860 INFO L93 Difference]: Finished difference Result 197 states and 460 transitions. [2022-03-15 15:52:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:43,860 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:43,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:43,861 INFO L225 Difference]: With dead ends: 197 [2022-03-15 15:52:43,861 INFO L226 Difference]: Without dead ends: 191 [2022-03-15 15:52:43,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:43,861 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:43,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 113 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:43,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-15 15:52:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 168. [2022-03-15 15:52:43,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.502994011976048) internal successors, (418), 167 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 418 transitions. [2022-03-15 15:52:43,868 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 418 transitions. Word has length 17 [2022-03-15 15:52:43,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:43,868 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 418 transitions. [2022-03-15 15:52:43,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 418 transitions. [2022-03-15 15:52:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:43,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:43,869 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:43,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:44,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:44,077 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:44,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1068352831, now seen corresponding path program 191 times [2022-03-15 15:52:44,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:44,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428227014] [2022-03-15 15:52:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:44,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:44,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:44,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428227014] [2022-03-15 15:52:44,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428227014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:44,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700093808] [2022-03-15 15:52:44,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:44,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:44,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:44,130 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) [2022-03-15 15:52:44,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-15 15:52:44,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:52:44,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:44,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:44,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:44,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:44,486 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:44,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-03-15 15:52:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:44,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700093808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:44,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:44,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-15 15:52:44,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536399378] [2022-03-15 15:52:44,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:44,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 15:52:44,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:44,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 15:52:44,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-15 15:52:44,498 INFO L87 Difference]: Start difference. First operand 168 states and 418 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:44,621 INFO L93 Difference]: Finished difference Result 191 states and 462 transitions. [2022-03-15 15:52:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:44,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:44,621 INFO L225 Difference]: With dead ends: 191 [2022-03-15 15:52:44,621 INFO L226 Difference]: Without dead ends: 191 [2022-03-15 15:52:44,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:52:44,622 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:44,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 92 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:44,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-15 15:52:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 167. [2022-03-15 15:52:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.5060240963855422) internal successors, (416), 166 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2022-03-15 15:52:44,624 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 17 [2022-03-15 15:52:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:44,624 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2022-03-15 15:52:44,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2022-03-15 15:52:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:44,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:44,624 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:44,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:44,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:44,825 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:44,825 INFO L85 PathProgramCache]: Analyzing trace with hash -478882637, now seen corresponding path program 192 times [2022-03-15 15:52:44,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:44,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240826261] [2022-03-15 15:52:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:44,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:44,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:44,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240826261] [2022-03-15 15:52:44,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240826261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:44,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265222478] [2022-03-15 15:52:44,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:44,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:44,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:44,885 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) [2022-03-15 15:52:44,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-15 15:52:45,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:45,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:45,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:45,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:45,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:52:45,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2022-03-15 15:52:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:45,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:45,310 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:45,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2022-03-15 15:52:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:45,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265222478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:45,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:45,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-15 15:52:45,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097994366] [2022-03-15 15:52:45,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:45,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 15:52:45,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:45,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 15:52:45,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-15 15:52:45,337 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:45,427 INFO L93 Difference]: Finished difference Result 179 states and 433 transitions. [2022-03-15 15:52:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:45,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:45,427 INFO L225 Difference]: With dead ends: 179 [2022-03-15 15:52:45,427 INFO L226 Difference]: Without dead ends: 171 [2022-03-15 15:52:45,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-15 15:52:45,428 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:45,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 79 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-03-15 15:52:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-15 15:52:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2022-03-15 15:52:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.5121951219512195) internal successors, (412), 164 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 412 transitions. [2022-03-15 15:52:45,429 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 412 transitions. Word has length 17 [2022-03-15 15:52:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:45,429 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 412 transitions. [2022-03-15 15:52:45,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:45,430 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 412 transitions. [2022-03-15 15:52:45,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:52:45,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:45,430 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:45,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:45,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:45,637 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:45,637 INFO L85 PathProgramCache]: Analyzing trace with hash -260344589, now seen corresponding path program 193 times [2022-03-15 15:52:45,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:45,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266384943] [2022-03-15 15:52:45,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:45,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:45,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:45,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266384943] [2022-03-15 15:52:45,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266384943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:45,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748426688] [2022-03-15 15:52:45,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:52:45,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:45,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:45,698 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) [2022-03-15 15:52:45,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-15 15:52:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:45,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 15:52:45,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:45,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:45,973 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:45,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 19 [2022-03-15 15:52:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:45,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748426688] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:45,977 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:45,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-03-15 15:52:45,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101298502] [2022-03-15 15:52:45,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:45,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 15:52:45,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:45,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 15:52:45,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-15 15:52:45,977 INFO L87 Difference]: Start difference. First operand 165 states and 412 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:46,054 INFO L93 Difference]: Finished difference Result 184 states and 446 transitions. [2022-03-15 15:52:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 15:52:46,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:52:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:46,055 INFO L225 Difference]: With dead ends: 184 [2022-03-15 15:52:46,055 INFO L226 Difference]: Without dead ends: 184 [2022-03-15 15:52:46,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-15 15:52:46,056 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:46,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 72 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:52:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-15 15:52:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 159. [2022-03-15 15:52:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.5126582278481013) internal successors, (397), 158 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 397 transitions. [2022-03-15 15:52:46,058 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 397 transitions. Word has length 17 [2022-03-15 15:52:46,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:46,058 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 397 transitions. [2022-03-15 15:52:46,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 397 transitions. [2022-03-15 15:52:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:46,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:46,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:46,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:46,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-03-15 15:52:46,275 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:46,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:46,275 INFO L85 PathProgramCache]: Analyzing trace with hash -688862841, now seen corresponding path program 194 times [2022-03-15 15:52:46,275 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:46,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715519377] [2022-03-15 15:52:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:46,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:46,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:46,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715519377] [2022-03-15 15:52:46,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715519377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:46,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393738529] [2022-03-15 15:52:46,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:52:46,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:46,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:46,472 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) [2022-03-15 15:52:46,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-15 15:52:46,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:52:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:52:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:46,915 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 178 treesize of output 142 [2022-03-15 15:52:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:47,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:47,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:47,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 175 [2022-03-15 15:52:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:47,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393738529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:47,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:47,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-03-15 15:52:47,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206536064] [2022-03-15 15:52:47,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:47,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:52:47,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:47,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:52:47,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:52:47,846 INFO L87 Difference]: Start difference. First operand 159 states and 397 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:48,495 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2022-03-15 15:52:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:52:48,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:48,496 INFO L225 Difference]: With dead ends: 256 [2022-03-15 15:52:48,496 INFO L226 Difference]: Without dead ends: 249 [2022-03-15 15:52:48,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:52:48,496 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:48,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 214 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:52:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-15 15:52:48,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 169. [2022-03-15 15:52:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.4761904761904763) internal successors, (416), 168 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 416 transitions. [2022-03-15 15:52:48,499 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 416 transitions. Word has length 18 [2022-03-15 15:52:48,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:48,499 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 416 transitions. [2022-03-15 15:52:48,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:48,499 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 416 transitions. [2022-03-15 15:52:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:48,499 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:48,499 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:48,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:48,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2022-03-15 15:52:48,699 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1787315015, now seen corresponding path program 195 times [2022-03-15 15:52:48,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:48,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544352819] [2022-03-15 15:52:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:48,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:49,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:49,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544352819] [2022-03-15 15:52:49,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544352819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:49,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755016551] [2022-03-15 15:52:49,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:52:49,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:49,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:49,016 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) [2022-03-15 15:52:49,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-15 15:52:49,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:52:49,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:52:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:49,556 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 146 treesize of output 118 [2022-03-15 15:52:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:49,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:50,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:50,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 219 [2022-03-15 15:52:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:50,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755016551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:50,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:50,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:52:50,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289020066] [2022-03-15 15:52:50,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:50,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:52:50,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:50,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:52:50,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:52:50,910 INFO L87 Difference]: Start difference. First operand 169 states and 416 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:52:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:51,607 INFO L93 Difference]: Finished difference Result 210 states and 487 transitions. [2022-03-15 15:52:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:52:51,607 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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 18 [2022-03-15 15:52:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:51,608 INFO L225 Difference]: With dead ends: 210 [2022-03-15 15:52:51,608 INFO L226 Difference]: Without dead ends: 203 [2022-03-15 15:52:51,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:52:51,608 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 111 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:51,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 238 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:52:51,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-15 15:52:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 170. [2022-03-15 15:52:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.4792899408284024) internal successors, (419), 169 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 419 transitions. [2022-03-15 15:52:51,610 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 419 transitions. Word has length 18 [2022-03-15 15:52:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:51,610 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 419 transitions. [2022-03-15 15:52:51,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:52:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 419 transitions. [2022-03-15 15:52:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:51,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:51,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:51,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:51,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:51,811 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:51,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1382051381, now seen corresponding path program 196 times [2022-03-15 15:52:51,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:51,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282096844] [2022-03-15 15:52:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:51,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:52,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:52,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282096844] [2022-03-15 15:52:52,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282096844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:52,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980831101] [2022-03-15 15:52:52,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:52:52,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:52,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:52,101 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) [2022-03-15 15:52:52,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-15 15:52:52,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:52:52,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:52:52,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:52,680 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 154 treesize of output 122 [2022-03-15 15:52:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:52,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:53,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:52:53,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 175 [2022-03-15 15:52:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:53,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980831101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:53,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:53,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 15:52:53,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586413986] [2022-03-15 15:52:53,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:53,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:52:53,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:53,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:52:53,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:52:53,709 INFO L87 Difference]: Start difference. First operand 170 states and 419 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:54,311 INFO L93 Difference]: Finished difference Result 265 states and 632 transitions. [2022-03-15 15:52:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:52:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:52:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:54,313 INFO L225 Difference]: With dead ends: 265 [2022-03-15 15:52:54,313 INFO L226 Difference]: Without dead ends: 258 [2022-03-15 15:52:54,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:52:54,313 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:54,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 233 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:52:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-15 15:52:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 172. [2022-03-15 15:52:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.4853801169590644) internal successors, (425), 171 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 425 transitions. [2022-03-15 15:52:54,316 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 425 transitions. Word has length 18 [2022-03-15 15:52:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:54,316 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 425 transitions. [2022-03-15 15:52:54,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 425 transitions. [2022-03-15 15:52:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:54,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:54,317 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:54,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:54,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:54,535 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash 316826311, now seen corresponding path program 197 times [2022-03-15 15:52:54,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:54,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681335330] [2022-03-15 15:52:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:54,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:54,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:54,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681335330] [2022-03-15 15:52:54,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681335330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:54,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577019699] [2022-03-15 15:52:54,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:52:54,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:54,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:54,925 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) [2022-03-15 15:52:54,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-15 15:52:55,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:52:55,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:55,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:52:55,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:55,600 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 142 treesize of output 114 [2022-03-15 15:52:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:55,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:56,506 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:56,507 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 215 treesize of output 178 [2022-03-15 15:52:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:56,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577019699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:56,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:56,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:52:56,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272695663] [2022-03-15 15:52:56,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:56,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:52:56,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:56,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:52:56,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:52:56,524 INFO L87 Difference]: Start difference. First operand 172 states and 425 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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) [2022-03-15 15:52:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:57,001 INFO L93 Difference]: Finished difference Result 266 states and 635 transitions. [2022-03-15 15:52:57,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:52:57,001 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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 18 [2022-03-15 15:52:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:57,001 INFO L225 Difference]: With dead ends: 266 [2022-03-15 15:52:57,002 INFO L226 Difference]: Without dead ends: 259 [2022-03-15 15:52:57,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:52:57,002 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 64 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:57,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 306 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:52:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-15 15:52:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2022-03-15 15:52:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.488372093023256) internal successors, (428), 172 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 428 transitions. [2022-03-15 15:52:57,004 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 428 transitions. Word has length 18 [2022-03-15 15:52:57,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:57,004 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 428 transitions. [2022-03-15 15:52:57,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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) [2022-03-15 15:52:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 428 transitions. [2022-03-15 15:52:57,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:57,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:57,005 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:57,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-03-15 15:52:57,227 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,SelfDestructingSolverStorable210 [2022-03-15 15:52:57,227 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:52:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:52:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1983675829, now seen corresponding path program 198 times [2022-03-15 15:52:57,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:52:57,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366762910] [2022-03-15 15:52:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:52:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:52:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:52:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:57,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:52:57,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366762910] [2022-03-15 15:52:57,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366762910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:52:57,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942155164] [2022-03-15 15:52:57,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:52:57,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:52:57,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:52:57,451 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) [2022-03-15 15:52:57,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-15 15:52:57,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:52:57,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:52:57,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:52:57,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:52:57,953 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 186 treesize of output 146 [2022-03-15 15:52:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:58,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:52:59,323 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:52:59,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 177 [2022-03-15 15:52:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:52:59,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942155164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:52:59,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:52:59,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:52:59,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968406993] [2022-03-15 15:52:59,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:52:59,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:52:59,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:52:59,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:52:59,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:52:59,335 INFO L87 Difference]: Start difference. First operand 173 states and 428 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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) [2022-03-15 15:52:59,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:52:59,792 INFO L93 Difference]: Finished difference Result 278 states and 654 transitions. [2022-03-15 15:52:59,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:52:59,793 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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 18 [2022-03-15 15:52:59,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:52:59,793 INFO L225 Difference]: With dead ends: 278 [2022-03-15 15:52:59,793 INFO L226 Difference]: Without dead ends: 271 [2022-03-15 15:52:59,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:52:59,793 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:52:59,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 275 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:52:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-03-15 15:52:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 174. [2022-03-15 15:52:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.4971098265895955) internal successors, (432), 173 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:52:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 432 transitions. [2022-03-15 15:52:59,796 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 432 transitions. Word has length 18 [2022-03-15 15:52:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:52:59,796 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 432 transitions. [2022-03-15 15:52:59,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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) [2022-03-15 15:52:59,796 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 432 transitions. [2022-03-15 15:52:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:52:59,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:52:59,796 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:52:59,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:00,012 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,SelfDestructingSolverStorable211 [2022-03-15 15:53:00,013 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:00,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1139667449, now seen corresponding path program 199 times [2022-03-15 15:53:00,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:00,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799935237] [2022-03-15 15:53:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:00,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:00,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799935237] [2022-03-15 15:53:00,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799935237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:00,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935454665] [2022-03-15 15:53:00,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:00,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:00,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:00,341 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) [2022-03-15 15:53:00,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-15 15:53:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:00,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:00,866 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 158 treesize of output 128 [2022-03-15 15:53:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:01,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:01,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:01,903 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 192 treesize of output 172 [2022-03-15 15:53:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:01,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935454665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:01,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:01,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:01,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081833175] [2022-03-15 15:53:01,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:01,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:01,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:01,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:01,993 INFO L87 Difference]: Start difference. First operand 174 states and 432 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:02,447 INFO L93 Difference]: Finished difference Result 266 states and 636 transitions. [2022-03-15 15:53:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:53:02,447 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:02,447 INFO L225 Difference]: With dead ends: 266 [2022-03-15 15:53:02,447 INFO L226 Difference]: Without dead ends: 259 [2022-03-15 15:53:02,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:53:02,448 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 80 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:02,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 211 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:53:02,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-15 15:53:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 173. [2022-03-15 15:53:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.488372093023256) internal successors, (428), 172 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 428 transitions. [2022-03-15 15:53:02,450 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 428 transitions. Word has length 18 [2022-03-15 15:53:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:02,450 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 428 transitions. [2022-03-15 15:53:02,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 428 transitions. [2022-03-15 15:53:02,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:02,450 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:02,450 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:02,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:02,651 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,SelfDestructingSolverStorable212 [2022-03-15 15:53:02,651 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:02,651 INFO L85 PathProgramCache]: Analyzing trace with hash -967056999, now seen corresponding path program 200 times [2022-03-15 15:53:02,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:02,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342130305] [2022-03-15 15:53:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:02,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:03,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:03,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342130305] [2022-03-15 15:53:03,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342130305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:03,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512204521] [2022-03-15 15:53:03,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:03,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:03,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:03,138 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) [2022-03-15 15:53:03,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-15 15:53:03,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:03,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:03,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:03,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:03,744 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 165 treesize of output 131 [2022-03-15 15:53:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:03,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:04,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:04,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:53:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:04,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512204521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:04,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:04,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:04,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648849447] [2022-03-15 15:53:04,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:04,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:04,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:04,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:04,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:04,829 INFO L87 Difference]: Start difference. First operand 173 states and 428 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:05,195 INFO L93 Difference]: Finished difference Result 215 states and 503 transitions. [2022-03-15 15:53:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:53:05,196 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:05,196 INFO L225 Difference]: With dead ends: 215 [2022-03-15 15:53:05,196 INFO L226 Difference]: Without dead ends: 208 [2022-03-15 15:53:05,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:53:05,196 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:05,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 240 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:53:05,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-15 15:53:05,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 175. [2022-03-15 15:53:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.4885057471264367) internal successors, (433), 174 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 433 transitions. [2022-03-15 15:53:05,198 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 433 transitions. Word has length 18 [2022-03-15 15:53:05,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:05,198 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 433 transitions. [2022-03-15 15:53:05,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 433 transitions. [2022-03-15 15:53:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:05,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:05,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:05,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:05,415 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,SelfDestructingSolverStorable213 [2022-03-15 15:53:05,415 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:05,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash 158543901, now seen corresponding path program 201 times [2022-03-15 15:53:05,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:05,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867377270] [2022-03-15 15:53:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:05,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:05,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867377270] [2022-03-15 15:53:05,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867377270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:05,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66301340] [2022-03-15 15:53:05,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:05,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:05,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:05,696 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) [2022-03-15 15:53:05,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-15 15:53:05,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:53:05,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:05,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:05,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:06,132 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 150 treesize of output 120 [2022-03-15 15:53:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:06,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:06,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:06,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 193 [2022-03-15 15:53:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:06,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66301340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:06,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:06,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:06,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374366607] [2022-03-15 15:53:06,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:06,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:06,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:06,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:06,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:06,989 INFO L87 Difference]: Start difference. First operand 175 states and 433 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:07,246 INFO L93 Difference]: Finished difference Result 219 states and 511 transitions. [2022-03-15 15:53:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:53:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:07,247 INFO L225 Difference]: With dead ends: 219 [2022-03-15 15:53:07,247 INFO L226 Difference]: Without dead ends: 212 [2022-03-15 15:53:07,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:53:07,247 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:07,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 184 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:53:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-15 15:53:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 176. [2022-03-15 15:53:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.4914285714285715) internal successors, (436), 175 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 436 transitions. [2022-03-15 15:53:07,249 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 436 transitions. Word has length 18 [2022-03-15 15:53:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:07,249 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 436 transitions. [2022-03-15 15:53:07,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:07,249 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 436 transitions. [2022-03-15 15:53:07,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:07,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:07,249 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:07,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:07,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:07,466 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:07,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:07,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1857421593, now seen corresponding path program 202 times [2022-03-15 15:53:07,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:07,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252276647] [2022-03-15 15:53:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:07,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:07,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:07,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252276647] [2022-03-15 15:53:07,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252276647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:07,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677177710] [2022-03-15 15:53:07,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:07,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:07,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:07,657 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) [2022-03-15 15:53:07,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-15 15:53:07,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:07,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:07,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:07,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:08,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:08,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 116 [2022-03-15 15:53:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:08,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:09,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:09,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:53:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:09,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677177710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:09,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:09,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:09,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915344150] [2022-03-15 15:53:09,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:09,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:09,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:09,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:09,616 INFO L87 Difference]: Start difference. First operand 176 states and 436 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:09,913 INFO L93 Difference]: Finished difference Result 211 states and 499 transitions. [2022-03-15 15:53:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:53:09,913 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:09,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:09,914 INFO L225 Difference]: With dead ends: 211 [2022-03-15 15:53:09,914 INFO L226 Difference]: Without dead ends: 204 [2022-03-15 15:53:09,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:53:09,914 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:09,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 222 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 568 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-03-15 15:53:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-15 15:53:09,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 177. [2022-03-15 15:53:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.4943181818181817) internal successors, (439), 176 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 439 transitions. [2022-03-15 15:53:09,916 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 439 transitions. Word has length 18 [2022-03-15 15:53:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:09,916 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 439 transitions. [2022-03-15 15:53:09,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 439 transitions. [2022-03-15 15:53:09,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:09,917 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:09,917 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:09,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:10,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:10,117 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:10,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:10,117 INFO L85 PathProgramCache]: Analyzing trace with hash -443080547, now seen corresponding path program 203 times [2022-03-15 15:53:10,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:10,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117747550] [2022-03-15 15:53:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:10,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:10,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:10,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117747550] [2022-03-15 15:53:10,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117747550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:10,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565406500] [2022-03-15 15:53:10,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:10,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:10,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:10,299 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) [2022-03-15 15:53:10,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-15 15:53:10,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:53:10,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:10,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:10,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:10,738 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 164 treesize of output 130 [2022-03-15 15:53:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:10,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:11,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:11,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 236 treesize of output 202 [2022-03-15 15:53:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:11,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565406500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:11,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:11,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:53:11,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716259386] [2022-03-15 15:53:11,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:11,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:53:11,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:11,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:53:11,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:53:11,726 INFO L87 Difference]: Start difference. First operand 177 states and 439 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:53:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:12,130 INFO L93 Difference]: Finished difference Result 232 states and 533 transitions. [2022-03-15 15:53:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:53:12,130 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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 18 [2022-03-15 15:53:12,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:12,130 INFO L225 Difference]: With dead ends: 232 [2022-03-15 15:53:12,130 INFO L226 Difference]: Without dead ends: 225 [2022-03-15 15:53:12,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:53:12,131 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:12,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 263 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:53:12,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-15 15:53:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 178. [2022-03-15 15:53:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.5028248587570623) internal successors, (443), 177 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 443 transitions. [2022-03-15 15:53:12,133 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 443 transitions. Word has length 18 [2022-03-15 15:53:12,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:12,133 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 443 transitions. [2022-03-15 15:53:12,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:53:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 443 transitions. [2022-03-15 15:53:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:12,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:12,133 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:12,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-03-15 15:53:12,339 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,SelfDestructingSolverStorable216 [2022-03-15 15:53:12,340 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:12,340 INFO L85 PathProgramCache]: Analyzing trace with hash 400927833, now seen corresponding path program 204 times [2022-03-15 15:53:12,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:12,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959537730] [2022-03-15 15:53:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:12,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:12,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:12,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959537730] [2022-03-15 15:53:12,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959537730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:12,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319526841] [2022-03-15 15:53:12,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:12,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:12,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:12,564 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) [2022-03-15 15:53:12,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-15 15:53:12,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:53:12,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:12,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:12,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:12,961 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 164 treesize of output 130 [2022-03-15 15:53:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:13,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:13,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:13,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 175 [2022-03-15 15:53:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:13,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319526841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:13,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:13,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:13,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821487190] [2022-03-15 15:53:13,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:13,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:13,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:13,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:13,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:13,970 INFO L87 Difference]: Start difference. First operand 178 states and 443 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:14,308 INFO L93 Difference]: Finished difference Result 220 states and 515 transitions. [2022-03-15 15:53:14,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:53:14,308 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:14,308 INFO L225 Difference]: With dead ends: 220 [2022-03-15 15:53:14,308 INFO L226 Difference]: Without dead ends: 213 [2022-03-15 15:53:14,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:53:14,309 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:14,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 241 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:53:14,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-15 15:53:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 175. [2022-03-15 15:53:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.4885057471264367) internal successors, (433), 174 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 433 transitions. [2022-03-15 15:53:14,311 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 433 transitions. Word has length 18 [2022-03-15 15:53:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:14,311 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 433 transitions. [2022-03-15 15:53:14,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 433 transitions. [2022-03-15 15:53:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:14,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:14,311 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:14,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-03-15 15:53:14,517 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,SelfDestructingSolverStorable217 [2022-03-15 15:53:14,518 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash -727254379, now seen corresponding path program 205 times [2022-03-15 15:53:14,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:14,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630426922] [2022-03-15 15:53:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:14,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:14,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:14,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630426922] [2022-03-15 15:53:14,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630426922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:14,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172447658] [2022-03-15 15:53:14,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:14,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:14,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:14,720 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) [2022-03-15 15:53:14,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-15 15:53:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:14,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:15,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:15,221 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 15:53:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:15,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:15,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:15,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 177 [2022-03-15 15:53:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:16,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172447658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:16,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:16,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:16,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416919757] [2022-03-15 15:53:16,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:16,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:16,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:16,066 INFO L87 Difference]: Start difference. First operand 175 states and 433 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:16,410 INFO L93 Difference]: Finished difference Result 262 states and 601 transitions. [2022-03-15 15:53:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:53:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:16,411 INFO L225 Difference]: With dead ends: 262 [2022-03-15 15:53:16,411 INFO L226 Difference]: Without dead ends: 248 [2022-03-15 15:53:16,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:53:16,411 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:16,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 327 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 634 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-03-15 15:53:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-15 15:53:16,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2022-03-15 15:53:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.518134715025907) internal successors, (486), 193 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 486 transitions. [2022-03-15 15:53:16,413 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 486 transitions. Word has length 18 [2022-03-15 15:53:16,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:16,413 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 486 transitions. [2022-03-15 15:53:16,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:16,413 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 486 transitions. [2022-03-15 15:53:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:16,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:16,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:16,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:16,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:16,624 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:16,624 INFO L85 PathProgramCache]: Analyzing trace with hash 329433565, now seen corresponding path program 206 times [2022-03-15 15:53:16,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:16,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426555838] [2022-03-15 15:53:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:16,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:17,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:17,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426555838] [2022-03-15 15:53:17,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426555838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:17,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763359883] [2022-03-15 15:53:17,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:17,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:17,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:17,031 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) [2022-03-15 15:53:17,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-15 15:53:17,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:17,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:17,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:17,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:17,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:17,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:53:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:17,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:18,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:18,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:53:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:18,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763359883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:18,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:18,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:18,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909759065] [2022-03-15 15:53:18,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:18,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:18,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:18,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:18,732 INFO L87 Difference]: Start difference. First operand 194 states and 486 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:19,332 INFO L93 Difference]: Finished difference Result 267 states and 600 transitions. [2022-03-15 15:53:19,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:53:19,333 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:19,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:19,333 INFO L225 Difference]: With dead ends: 267 [2022-03-15 15:53:19,333 INFO L226 Difference]: Without dead ends: 261 [2022-03-15 15:53:19,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:53:19,333 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:19,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 372 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 832 Invalid, 0 Unknown, 175 Unchecked, 0.4s Time] [2022-03-15 15:53:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-15 15:53:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 188. [2022-03-15 15:53:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5240641711229945) internal successors, (472), 187 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 472 transitions. [2022-03-15 15:53:19,336 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 472 transitions. Word has length 18 [2022-03-15 15:53:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:19,336 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 472 transitions. [2022-03-15 15:53:19,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 472 transitions. [2022-03-15 15:53:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:19,336 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:19,336 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:19,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-03-15 15:53:19,536 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,SelfDestructingSolverStorable219 [2022-03-15 15:53:19,537 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:19,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:19,537 INFO L85 PathProgramCache]: Analyzing trace with hash 971623313, now seen corresponding path program 207 times [2022-03-15 15:53:19,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:19,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920983100] [2022-03-15 15:53:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:19,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:19,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:19,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920983100] [2022-03-15 15:53:19,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920983100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:19,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523968375] [2022-03-15 15:53:19,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:19,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:19,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:19,833 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) [2022-03-15 15:53:19,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-15 15:53:19,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:53:19,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:19,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:19,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:20,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:20,549 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 132 [2022-03-15 15:53:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:20,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:21,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:21,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 176 [2022-03-15 15:53:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:21,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523968375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:21,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:21,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:53:21,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598064159] [2022-03-15 15:53:21,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:21,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:53:21,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:21,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:53:21,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:21,644 INFO L87 Difference]: Start difference. First operand 188 states and 472 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:53:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:22,935 INFO L93 Difference]: Finished difference Result 300 states and 703 transitions. [2022-03-15 15:53:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 15:53:22,936 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:53:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:22,936 INFO L225 Difference]: With dead ends: 300 [2022-03-15 15:53:22,936 INFO L226 Difference]: Without dead ends: 279 [2022-03-15 15:53:22,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=263, Invalid=2089, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:53:22,936 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 116 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:22,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 253 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 643 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-03-15 15:53:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-15 15:53:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 219. [2022-03-15 15:53:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.6055045871559632) internal successors, (568), 218 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 568 transitions. [2022-03-15 15:53:22,939 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 568 transitions. Word has length 18 [2022-03-15 15:53:22,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:22,939 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 568 transitions. [2022-03-15 15:53:22,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:53:22,939 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 568 transitions. [2022-03-15 15:53:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:22,940 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:22,940 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:22,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-15 15:53:23,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:23,155 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:23,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:23,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2028311257, now seen corresponding path program 208 times [2022-03-15 15:53:23,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:23,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039291669] [2022-03-15 15:53:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:23,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:23,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:23,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039291669] [2022-03-15 15:53:23,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039291669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:23,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455000005] [2022-03-15 15:53:23,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:23,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:23,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:23,418 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) [2022-03-15 15:53:23,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-15 15:53:23,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:23,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:23,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:23,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:24,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:24,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 130 [2022-03-15 15:53:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:24,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:25,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:25,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:53:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:25,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455000005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:25,227 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:25,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:25,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514867452] [2022-03-15 15:53:25,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:25,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:25,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:25,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:25,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:25,228 INFO L87 Difference]: Start difference. First operand 219 states and 568 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:25,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:25,546 INFO L93 Difference]: Finished difference Result 274 states and 652 transitions. [2022-03-15 15:53:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:53:25,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:25,547 INFO L225 Difference]: With dead ends: 274 [2022-03-15 15:53:25,547 INFO L226 Difference]: Without dead ends: 271 [2022-03-15 15:53:25,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:53:25,547 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:25,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 239 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 681 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-03-15 15:53:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-03-15 15:53:25,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 221. [2022-03-15 15:53:25,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6) internal successors, (572), 220 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 572 transitions. [2022-03-15 15:53:25,550 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 572 transitions. Word has length 18 [2022-03-15 15:53:25,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:25,550 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 572 transitions. [2022-03-15 15:53:25,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:25,550 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 572 transitions. [2022-03-15 15:53:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:25,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:25,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:25,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:25,754 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,SelfDestructingSolverStorable221 [2022-03-15 15:53:25,754 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1328878827, now seen corresponding path program 209 times [2022-03-15 15:53:25,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:25,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985434390] [2022-03-15 15:53:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:25,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:25,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:25,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985434390] [2022-03-15 15:53:25,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985434390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:25,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664274156] [2022-03-15 15:53:25,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:25,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:25,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:25,970 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) [2022-03-15 15:53:25,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-15 15:53:26,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:53:26,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:26,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:26,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:26,321 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 186 treesize of output 146 [2022-03-15 15:53:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:26,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:27,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:27,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 264 treesize of output 214 [2022-03-15 15:53:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:27,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664274156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:27,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:27,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:53:27,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339555430] [2022-03-15 15:53:27,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:27,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:53:27,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:53:27,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:53:27,329 INFO L87 Difference]: Start difference. First operand 221 states and 572 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:53:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:27,927 INFO L93 Difference]: Finished difference Result 327 states and 748 transitions. [2022-03-15 15:53:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:53:27,927 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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 18 [2022-03-15 15:53:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:27,928 INFO L225 Difference]: With dead ends: 327 [2022-03-15 15:53:27,928 INFO L226 Difference]: Without dead ends: 320 [2022-03-15 15:53:27,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:53:27,928 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 101 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:27,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 357 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:53:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-03-15 15:53:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 221. [2022-03-15 15:53:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6136363636363638) internal successors, (575), 220 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 575 transitions. [2022-03-15 15:53:27,931 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 575 transitions. Word has length 18 [2022-03-15 15:53:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:27,932 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 575 transitions. [2022-03-15 15:53:27,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:53:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 575 transitions. [2022-03-15 15:53:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:27,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:27,932 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:27,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-15 15:53:28,147 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,SelfDestructingSolverStorable222 [2022-03-15 15:53:28,147 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:28,148 INFO L85 PathProgramCache]: Analyzing trace with hash -484870447, now seen corresponding path program 210 times [2022-03-15 15:53:28,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:28,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951129127] [2022-03-15 15:53:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:28,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:28,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:28,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951129127] [2022-03-15 15:53:28,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951129127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:28,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103999081] [2022-03-15 15:53:28,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:28,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:28,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:28,386 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) [2022-03-15 15:53:28,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-15 15:53:28,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:53:28,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:28,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:28,809 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 160 treesize of output 126 [2022-03-15 15:53:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:28,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:29,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:29,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 203 [2022-03-15 15:53:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:29,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103999081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:29,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:29,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:29,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313754130] [2022-03-15 15:53:29,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:29,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:29,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:29,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:29,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:29,658 INFO L87 Difference]: Start difference. First operand 221 states and 575 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:30,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:30,413 INFO L93 Difference]: Finished difference Result 315 states and 728 transitions. [2022-03-15 15:53:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:53:30,414 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:30,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:30,414 INFO L225 Difference]: With dead ends: 315 [2022-03-15 15:53:30,414 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 15:53:30,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:53:30,414 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:30,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 332 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:53:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 15:53:30,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 220. [2022-03-15 15:53:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.6073059360730593) internal successors, (571), 219 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 571 transitions. [2022-03-15 15:53:30,417 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 571 transitions. Word has length 18 [2022-03-15 15:53:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:30,417 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 571 transitions. [2022-03-15 15:53:30,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 571 transitions. [2022-03-15 15:53:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:30,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:30,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:30,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:30,620 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,SelfDestructingSolverStorable223 [2022-03-15 15:53:30,620 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:30,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1135160807, now seen corresponding path program 211 times [2022-03-15 15:53:30,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:30,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981478219] [2022-03-15 15:53:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:30,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:30,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:30,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981478219] [2022-03-15 15:53:30,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981478219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:30,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219598681] [2022-03-15 15:53:30,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:30,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:30,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:30,802 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) [2022-03-15 15:53:30,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-15 15:53:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:30,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:31,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:31,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 134 [2022-03-15 15:53:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:31,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:31,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:31,859 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 223 treesize of output 191 [2022-03-15 15:53:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:31,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219598681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:31,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:31,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 15:53:31,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8776673] [2022-03-15 15:53:31,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:31,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:53:31,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:31,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:53:31,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:53:32,005 INFO L87 Difference]: Start difference. First operand 220 states and 571 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:32,415 INFO L93 Difference]: Finished difference Result 350 states and 812 transitions. [2022-03-15 15:53:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:53:32,415 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:32,415 INFO L225 Difference]: With dead ends: 350 [2022-03-15 15:53:32,416 INFO L226 Difference]: Without dead ends: 343 [2022-03-15 15:53:32,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:53:32,416 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:32,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 364 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 746 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-03-15 15:53:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-03-15 15:53:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 228. [2022-03-15 15:53:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.656387665198238) internal successors, (603), 227 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 603 transitions. [2022-03-15 15:53:32,419 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 603 transitions. Word has length 18 [2022-03-15 15:53:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:32,419 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 603 transitions. [2022-03-15 15:53:32,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 603 transitions. [2022-03-15 15:53:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:32,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:32,419 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:32,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:32,621 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,SelfDestructingSolverStorable224 [2022-03-15 15:53:32,622 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:32,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:32,622 INFO L85 PathProgramCache]: Analyzing trace with hash 859304349, now seen corresponding path program 212 times [2022-03-15 15:53:32,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:32,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018407266] [2022-03-15 15:53:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:32,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:32,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:32,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018407266] [2022-03-15 15:53:32,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018407266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:32,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098896346] [2022-03-15 15:53:32,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:32,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:32,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:32,740 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) [2022-03-15 15:53:32,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-15 15:53:32,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:32,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:32,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:32,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:33,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:33,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 116 [2022-03-15 15:53:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:33,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:34,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:34,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 212 [2022-03-15 15:53:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:34,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098896346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:34,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:34,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 15:53:34,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893607401] [2022-03-15 15:53:34,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:34,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:53:34,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:34,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:53:34,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:53:34,267 INFO L87 Difference]: Start difference. First operand 228 states and 603 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:34,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:34,814 INFO L93 Difference]: Finished difference Result 334 states and 789 transitions. [2022-03-15 15:53:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:53:34,814 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:34,815 INFO L225 Difference]: With dead ends: 334 [2022-03-15 15:53:34,815 INFO L226 Difference]: Without dead ends: 327 [2022-03-15 15:53:34,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:53:34,815 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 92 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:34,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 239 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 701 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-03-15 15:53:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-03-15 15:53:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 224. [2022-03-15 15:53:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6367713004484306) internal successors, (588), 223 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 588 transitions. [2022-03-15 15:53:34,818 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 588 transitions. Word has length 18 [2022-03-15 15:53:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:34,818 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 588 transitions. [2022-03-15 15:53:34,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 588 transitions. [2022-03-15 15:53:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:34,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:34,818 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:34,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:35,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:35,031 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:35,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:35,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1703312729, now seen corresponding path program 213 times [2022-03-15 15:53:35,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:35,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665948024] [2022-03-15 15:53:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:35,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:35,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:35,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665948024] [2022-03-15 15:53:35,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665948024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:35,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123794754] [2022-03-15 15:53:35,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:35,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:35,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:35,403 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:35,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-15 15:53:35,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:53:35,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:35,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:35,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:35,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:35,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 125 [2022-03-15 15:53:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:36,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:36,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:36,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 172 [2022-03-15 15:53:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:36,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123794754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:36,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:36,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 15:53:36,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829221660] [2022-03-15 15:53:36,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:36,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:53:36,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:36,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:53:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:53:36,809 INFO L87 Difference]: Start difference. First operand 224 states and 588 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:37,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:37,432 INFO L93 Difference]: Finished difference Result 360 states and 818 transitions. [2022-03-15 15:53:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:53:37,432 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:37,433 INFO L225 Difference]: With dead ends: 360 [2022-03-15 15:53:37,433 INFO L226 Difference]: Without dead ends: 353 [2022-03-15 15:53:37,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:53:37,433 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 86 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:37,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 448 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1121 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2022-03-15 15:53:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-03-15 15:53:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 225. [2022-03-15 15:53:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.642857142857143) internal successors, (592), 224 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 592 transitions. [2022-03-15 15:53:37,436 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 592 transitions. Word has length 18 [2022-03-15 15:53:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:37,436 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 592 transitions. [2022-03-15 15:53:37,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:37,436 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 592 transitions. [2022-03-15 15:53:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:37,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:37,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:37,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:37,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-03-15 15:53:37,643 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1286866411, now seen corresponding path program 214 times [2022-03-15 15:53:37,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:37,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994311679] [2022-03-15 15:53:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:37,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:37,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:37,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994311679] [2022-03-15 15:53:37,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994311679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:37,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945229859] [2022-03-15 15:53:37,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:37,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:37,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:37,812 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:37,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-15 15:53:37,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:37,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:37,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:37,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:38,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:38,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 143 [2022-03-15 15:53:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:38,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:39,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:39,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 201 [2022-03-15 15:53:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:39,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945229859] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:39,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:39,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 15:53:39,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823314502] [2022-03-15 15:53:39,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:39,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:53:39,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:39,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:53:39,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:53:39,487 INFO L87 Difference]: Start difference. First operand 225 states and 592 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:40,340 INFO L93 Difference]: Finished difference Result 403 states and 907 transitions. [2022-03-15 15:53:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:53:40,340 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:40,341 INFO L225 Difference]: With dead ends: 403 [2022-03-15 15:53:40,341 INFO L226 Difference]: Without dead ends: 389 [2022-03-15 15:53:40,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:53:40,341 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 117 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:40,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 400 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:53:40,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-03-15 15:53:40,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 231. [2022-03-15 15:53:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.6739130434782608) internal successors, (615), 230 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:40,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 615 transitions. [2022-03-15 15:53:40,344 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 615 transitions. Word has length 18 [2022-03-15 15:53:40,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:40,344 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 615 transitions. [2022-03-15 15:53:40,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 615 transitions. [2022-03-15 15:53:40,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:40,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:40,345 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:40,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:40,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:40,551 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:40,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:40,551 INFO L85 PathProgramCache]: Analyzing trace with hash -442858031, now seen corresponding path program 215 times [2022-03-15 15:53:40,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:40,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291129023] [2022-03-15 15:53:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:40,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:40,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:40,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291129023] [2022-03-15 15:53:40,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291129023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:40,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314293947] [2022-03-15 15:53:40,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:40,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:40,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:40,780 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:40,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-15 15:53:40,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:53:40,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:40,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:41,143 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 140 treesize of output 112 [2022-03-15 15:53:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:41,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:41,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:41,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 200 [2022-03-15 15:53:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:42,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314293947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:42,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:42,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:53:42,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107599807] [2022-03-15 15:53:42,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:42,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:53:42,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:53:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:42,071 INFO L87 Difference]: Start difference. First operand 231 states and 615 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:42,755 INFO L93 Difference]: Finished difference Result 407 states and 911 transitions. [2022-03-15 15:53:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:53:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:42,756 INFO L225 Difference]: With dead ends: 407 [2022-03-15 15:53:42,756 INFO L226 Difference]: Without dead ends: 393 [2022-03-15 15:53:42,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:53:42,756 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 137 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:42,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 360 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:53:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-03-15 15:53:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 231. [2022-03-15 15:53:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.6739130434782608) internal successors, (615), 230 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 615 transitions. [2022-03-15 15:53:42,761 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 615 transitions. Word has length 18 [2022-03-15 15:53:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:42,761 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 615 transitions. [2022-03-15 15:53:42,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 615 transitions. [2022-03-15 15:53:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:42,762 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:42,762 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:42,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-15 15:53:42,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:42,963 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1791249463, now seen corresponding path program 216 times [2022-03-15 15:53:42,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:42,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880926611] [2022-03-15 15:53:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:42,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:43,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:43,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880926611] [2022-03-15 15:53:43,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880926611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:43,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355029384] [2022-03-15 15:53:43,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:43,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:43,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:43,187 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:43,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-15 15:53:43,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:53:43,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:43,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:43,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:43,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:43,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 130 [2022-03-15 15:53:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:43,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:44,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:44,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 176 [2022-03-15 15:53:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:44,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355029384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:44,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:44,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 15:53:44,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545368456] [2022-03-15 15:53:44,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:44,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:53:44,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:44,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:53:44,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:53:44,541 INFO L87 Difference]: Start difference. First operand 231 states and 615 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:45,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:45,860 INFO L93 Difference]: Finished difference Result 270 states and 538 transitions. [2022-03-15 15:53:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 15:53:45,860 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:45,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:45,860 INFO L225 Difference]: With dead ends: 270 [2022-03-15 15:53:45,860 INFO L226 Difference]: Without dead ends: 245 [2022-03-15 15:53:45,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=408, Invalid=2042, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 15:53:45,861 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 255 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:45,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 321 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:53:45,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-15 15:53:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 121. [2022-03-15 15:53:45,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.0166666666666666) internal successors, (242), 120 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 242 transitions. [2022-03-15 15:53:45,862 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 242 transitions. Word has length 18 [2022-03-15 15:53:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:45,862 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 242 transitions. [2022-03-15 15:53:45,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 242 transitions. [2022-03-15 15:53:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:45,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:45,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:45,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:46,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2022-03-15 15:53:46,063 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:46,064 INFO L85 PathProgramCache]: Analyzing trace with hash -453243513, now seen corresponding path program 217 times [2022-03-15 15:53:46,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:46,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524034492] [2022-03-15 15:53:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:46,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:46,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:46,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524034492] [2022-03-15 15:53:46,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524034492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:46,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147294477] [2022-03-15 15:53:46,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:53:46,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:46,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:46,260 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:46,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-15 15:53:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:46,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:46,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:46,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:46,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:53:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:46,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:47,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:47,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:53:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:47,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147294477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:47,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:47,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:53:47,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829290016] [2022-03-15 15:53:47,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:47,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:53:47,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:53:47,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:47,946 INFO L87 Difference]: Start difference. First operand 121 states and 242 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:53:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:48,141 INFO L93 Difference]: Finished difference Result 151 states and 294 transitions. [2022-03-15 15:53:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:53:48,142 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:53:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:48,142 INFO L225 Difference]: With dead ends: 151 [2022-03-15 15:53:48,142 INFO L226 Difference]: Without dead ends: 144 [2022-03-15 15:53:48,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:53:48,142 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:48,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 199 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 371 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-03-15 15:53:48,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-15 15:53:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 124. [2022-03-15 15:53:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.016260162601626) internal successors, (248), 123 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 248 transitions. [2022-03-15 15:53:48,144 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 248 transitions. Word has length 18 [2022-03-15 15:53:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:48,144 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 248 transitions. [2022-03-15 15:53:48,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:53:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 248 transitions. [2022-03-15 15:53:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:48,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:48,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:48,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-03-15 15:53:48,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:48,344 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1613564751, now seen corresponding path program 218 times [2022-03-15 15:53:48,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:48,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65843064] [2022-03-15 15:53:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:48,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:48,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:48,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65843064] [2022-03-15 15:53:48,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65843064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:48,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091131389] [2022-03-15 15:53:48,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:53:48,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:48,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:48,681 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:48,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-15 15:53:48,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:53:48,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:48,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:49,349 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 153 treesize of output 123 [2022-03-15 15:53:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:49,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:50,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:50,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 177 [2022-03-15 15:53:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:50,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091131389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:50,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:50,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:53:50,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022088864] [2022-03-15 15:53:50,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:50,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:53:50,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:50,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:53:50,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:53:50,471 INFO L87 Difference]: Start difference. First operand 124 states and 248 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:50,821 INFO L93 Difference]: Finished difference Result 151 states and 290 transitions. [2022-03-15 15:53:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:53:50,822 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:50,822 INFO L225 Difference]: With dead ends: 151 [2022-03-15 15:53:50,822 INFO L226 Difference]: Without dead ends: 148 [2022-03-15 15:53:50,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:50,822 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:50,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 184 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:53:50,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-15 15:53:50,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 122. [2022-03-15 15:53:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.0165289256198347) internal successors, (244), 121 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 244 transitions. [2022-03-15 15:53:50,824 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 244 transitions. Word has length 18 [2022-03-15 15:53:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:50,824 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 244 transitions. [2022-03-15 15:53:50,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 244 transitions. [2022-03-15 15:53:50,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:50,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:50,824 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:50,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:51,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:51,024 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:51,025 INFO L85 PathProgramCache]: Analyzing trace with hash 672357387, now seen corresponding path program 219 times [2022-03-15 15:53:51,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:51,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689091686] [2022-03-15 15:53:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:51,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:51,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:51,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689091686] [2022-03-15 15:53:51,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689091686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:51,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507075875] [2022-03-15 15:53:51,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:53:51,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:51,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:51,273 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:51,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-15 15:53:51,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:53:51,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:51,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:51,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:52,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:53:52,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:53:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:52,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:52,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:52,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 193 [2022-03-15 15:53:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:53,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507075875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:53,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:53,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:53:53,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806707807] [2022-03-15 15:53:53,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:53,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:53:53,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:53:53,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:53:53,089 INFO L87 Difference]: Start difference. First operand 122 states and 244 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:53:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:53,438 INFO L93 Difference]: Finished difference Result 154 states and 298 transitions. [2022-03-15 15:53:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:53:53,438 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:53:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:53,438 INFO L225 Difference]: With dead ends: 154 [2022-03-15 15:53:53,438 INFO L226 Difference]: Without dead ends: 147 [2022-03-15 15:53:53,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:53:53,439 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:53,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 213 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 543 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-03-15 15:53:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-15 15:53:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 125. [2022-03-15 15:53:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.0161290322580645) internal successors, (250), 124 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 250 transitions. [2022-03-15 15:53:53,440 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 250 transitions. Word has length 18 [2022-03-15 15:53:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:53,440 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 250 transitions. [2022-03-15 15:53:53,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:53:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 250 transitions. [2022-03-15 15:53:53,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:53,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:53,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:53,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:53,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-15 15:53:53,658 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:53,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:53,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1729045331, now seen corresponding path program 220 times [2022-03-15 15:53:53,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:53,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613060702] [2022-03-15 15:53:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:53,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:53,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:53,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613060702] [2022-03-15 15:53:53,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613060702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:53,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244757650] [2022-03-15 15:53:53,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:53:53,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:53,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:53,963 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:53,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-15 15:53:54,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:53:54,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:54,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:54,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:54,625 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 178 treesize of output 140 [2022-03-15 15:53:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:54,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:55,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:55,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:53:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:55,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244757650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:55,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:55,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:53:55,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123948855] [2022-03-15 15:53:55,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:55,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:53:55,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:53:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:53:55,812 INFO L87 Difference]: Start difference. First operand 125 states and 250 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:56,360 INFO L93 Difference]: Finished difference Result 155 states and 297 transitions. [2022-03-15 15:53:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:53:56,361 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:53:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:56,361 INFO L225 Difference]: With dead ends: 155 [2022-03-15 15:53:56,361 INFO L226 Difference]: Without dead ends: 152 [2022-03-15 15:53:56,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:53:56,361 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:56,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 198 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:53:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-15 15:53:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 123. [2022-03-15 15:53:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.0163934426229506) internal successors, (246), 122 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 246 transitions. [2022-03-15 15:53:56,363 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 246 transitions. Word has length 18 [2022-03-15 15:53:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:56,363 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 246 transitions. [2022-03-15 15:53:56,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 246 transitions. [2022-03-15 15:53:56,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:56,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:56,363 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:56,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-15 15:53:56,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-03-15 15:53:56,564 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:56,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:56,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1923732217, now seen corresponding path program 221 times [2022-03-15 15:53:56,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:56,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422619201] [2022-03-15 15:53:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:56,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:56,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:56,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422619201] [2022-03-15 15:53:56,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422619201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:56,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145877297] [2022-03-15 15:53:56,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:53:56,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:56,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:56,778 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:56,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-15 15:53:56,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:53:56,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:56,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:56,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:57,359 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 168 treesize of output 134 [2022-03-15 15:53:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:57,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:53:58,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:53:58,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 177 [2022-03-15 15:53:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:58,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145877297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:53:58,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:53:58,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:53:58,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488244131] [2022-03-15 15:53:58,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:53:58,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:53:58,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:53:58,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:53:58,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:53:58,371 INFO L87 Difference]: Start difference. First operand 123 states and 246 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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) [2022-03-15 15:53:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:53:58,792 INFO L93 Difference]: Finished difference Result 157 states and 304 transitions. [2022-03-15 15:53:58,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:53:58,792 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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 18 [2022-03-15 15:53:58,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:53:58,793 INFO L225 Difference]: With dead ends: 157 [2022-03-15 15:53:58,793 INFO L226 Difference]: Without dead ends: 150 [2022-03-15 15:53:58,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:53:58,793 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:53:58,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 209 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:53:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-15 15:53:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2022-03-15 15:53:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.0163934426229506) internal successors, (246), 122 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:53:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 246 transitions. [2022-03-15 15:53:58,794 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 246 transitions. Word has length 18 [2022-03-15 15:53:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:53:58,794 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 246 transitions. [2022-03-15 15:53:58,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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) [2022-03-15 15:53:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 246 transitions. [2022-03-15 15:53:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:53:58,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:53:58,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:53:58,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-03-15 15:53:59,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-03-15 15:53:59,012 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:53:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:53:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash 70732939, now seen corresponding path program 222 times [2022-03-15 15:53:59,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:53:59,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479750128] [2022-03-15 15:53:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:53:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:53:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:53:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:59,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:53:59,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479750128] [2022-03-15 15:53:59,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479750128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:53:59,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138707224] [2022-03-15 15:53:59,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:53:59,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:53:59,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:53:59,274 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:53:59,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-15 15:53:59,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:53:59,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:53:59,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:53:59,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:53:59,731 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 164 treesize of output 130 [2022-03-15 15:53:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:53:59,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:01,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:01,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 186 [2022-03-15 15:54:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:01,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138707224] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:01,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:01,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:54:01,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678894423] [2022-03-15 15:54:01,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:01,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:54:01,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:01,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:54:01,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:54:01,233 INFO L87 Difference]: Start difference. First operand 123 states and 246 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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) [2022-03-15 15:54:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:01,746 INFO L93 Difference]: Finished difference Result 170 states and 321 transitions. [2022-03-15 15:54:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:54:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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 18 [2022-03-15 15:54:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:01,747 INFO L225 Difference]: With dead ends: 170 [2022-03-15 15:54:01,747 INFO L226 Difference]: Without dead ends: 163 [2022-03-15 15:54:01,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:54:01,747 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:01,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 218 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:54:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-15 15:54:01,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 124. [2022-03-15 15:54:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.016260162601626) internal successors, (248), 123 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 248 transitions. [2022-03-15 15:54:01,749 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 248 transitions. Word has length 18 [2022-03-15 15:54:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:01,749 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 248 transitions. [2022-03-15 15:54:01,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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) [2022-03-15 15:54:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 248 transitions. [2022-03-15 15:54:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:01,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:01,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:01,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-15 15:54:01,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-15 15:54:01,950 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:01,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:01,950 INFO L85 PathProgramCache]: Analyzing trace with hash 914741319, now seen corresponding path program 223 times [2022-03-15 15:54:01,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:01,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758201966] [2022-03-15 15:54:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:01,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:02,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:02,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758201966] [2022-03-15 15:54:02,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758201966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:02,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941618862] [2022-03-15 15:54:02,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:02,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:02,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:02,325 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:02,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-15 15:54:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:02,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:02,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:03,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:03,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 144 [2022-03-15 15:54:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:03,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:03,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:03,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 210 [2022-03-15 15:54:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:04,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941618862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:04,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:04,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:54:04,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440340101] [2022-03-15 15:54:04,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:04,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:54:04,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:04,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:54:04,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:04,153 INFO L87 Difference]: Start difference. First operand 124 states and 248 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:54:04,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:04,491 INFO L93 Difference]: Finished difference Result 156 states and 300 transitions. [2022-03-15 15:54:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:54:04,492 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:54:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:04,492 INFO L225 Difference]: With dead ends: 156 [2022-03-15 15:54:04,492 INFO L226 Difference]: Without dead ends: 147 [2022-03-15 15:54:04,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:54:04,492 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:04,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 157 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 409 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-03-15 15:54:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-15 15:54:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2022-03-15 15:54:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2022-03-15 15:54:04,494 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 18 [2022-03-15 15:54:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:04,494 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2022-03-15 15:54:04,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:54:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2022-03-15 15:54:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:04,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:04,494 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:04,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-03-15 15:54:04,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-03-15 15:54:04,707 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:04,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:04,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1903383797, now seen corresponding path program 224 times [2022-03-15 15:54:04,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:04,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313057028] [2022-03-15 15:54:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:04,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:04,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:04,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313057028] [2022-03-15 15:54:04,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313057028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:04,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500012770] [2022-03-15 15:54:04,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:04,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:04,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:04,959 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:04,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-15 15:54:05,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:05,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:05,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:05,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:05,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:05,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 116 [2022-03-15 15:54:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:05,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:06,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:06,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:54:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:06,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500012770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:06,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:06,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:54:06,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208928962] [2022-03-15 15:54:06,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:06,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:06,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:06,386 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:54:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:06,553 INFO L93 Difference]: Finished difference Result 136 states and 267 transitions. [2022-03-15 15:54:06,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:54:06,554 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 18 [2022-03-15 15:54:06,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:06,554 INFO L225 Difference]: With dead ends: 136 [2022-03-15 15:54:06,554 INFO L226 Difference]: Without dead ends: 129 [2022-03-15 15:54:06,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:06,554 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:06,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 158 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 460 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2022-03-15 15:54:06,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-15 15:54:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2022-03-15 15:54:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.0165289256198347) internal successors, (244), 121 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 244 transitions. [2022-03-15 15:54:06,556 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 244 transitions. Word has length 18 [2022-03-15 15:54:06,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:06,556 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 244 transitions. [2022-03-15 15:54:06,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:54:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 244 transitions. [2022-03-15 15:54:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:06,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:06,556 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:06,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-03-15 15:54:06,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:06,770 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -9823225, now seen corresponding path program 225 times [2022-03-15 15:54:06,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:06,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191874731] [2022-03-15 15:54:06,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:06,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:06,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:06,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191874731] [2022-03-15 15:54:06,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191874731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:06,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483960886] [2022-03-15 15:54:06,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:06,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:06,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:06,982 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:06,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-15 15:54:07,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:07,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:07,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:54:07,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:07,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:07,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:54:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:07,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:08,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:08,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 221 [2022-03-15 15:54:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:08,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483960886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:08,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:08,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 15:54:08,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764032516] [2022-03-15 15:54:08,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:08,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:54:08,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:08,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:54:08,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:54:08,957 INFO L87 Difference]: Start difference. First operand 122 states and 244 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:09,651 INFO L93 Difference]: Finished difference Result 169 states and 319 transitions. [2022-03-15 15:54:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:54:09,651 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:09,652 INFO L225 Difference]: With dead ends: 169 [2022-03-15 15:54:09,652 INFO L226 Difference]: Without dead ends: 166 [2022-03-15 15:54:09,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=281, Invalid=1699, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:54:09,652 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:09,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 258 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 821 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-03-15 15:54:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-15 15:54:09,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2022-03-15 15:54:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2022-03-15 15:54:09,654 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 18 [2022-03-15 15:54:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:09,654 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2022-03-15 15:54:09,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2022-03-15 15:54:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:09,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:09,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:09,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:09,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:09,854 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:09,855 INFO L85 PathProgramCache]: Analyzing trace with hash 852181839, now seen corresponding path program 226 times [2022-03-15 15:54:09,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:09,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167128867] [2022-03-15 15:54:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:09,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:10,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:10,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167128867] [2022-03-15 15:54:10,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167128867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:10,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451789211] [2022-03-15 15:54:10,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:10,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:10,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:10,042 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:10,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-15 15:54:10,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:10,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:10,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:10,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:10,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:10,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:54:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:10,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:11,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:11,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:54:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:11,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451789211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:11,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:11,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:54:11,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534044346] [2022-03-15 15:54:11,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:11,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:11,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:11,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:11,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:11,389 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:54:11,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:11,582 INFO L93 Difference]: Finished difference Result 133 states and 260 transitions. [2022-03-15 15:54:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:54:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 18 [2022-03-15 15:54:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:11,582 INFO L225 Difference]: With dead ends: 133 [2022-03-15 15:54:11,582 INFO L226 Difference]: Without dead ends: 130 [2022-03-15 15:54:11,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:11,582 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:11,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 117 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 450 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-03-15 15:54:11,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-15 15:54:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2022-03-15 15:54:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.0166666666666666) internal successors, (242), 120 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 242 transitions. [2022-03-15 15:54:11,584 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 242 transitions. Word has length 18 [2022-03-15 15:54:11,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:11,584 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 242 transitions. [2022-03-15 15:54:11,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:54:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 242 transitions. [2022-03-15 15:54:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:11,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:11,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:11,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:11,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-03-15 15:54:11,797 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:11,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1789959051, now seen corresponding path program 227 times [2022-03-15 15:54:11,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:11,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724812139] [2022-03-15 15:54:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:11,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:12,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:12,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724812139] [2022-03-15 15:54:12,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724812139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:12,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166818098] [2022-03-15 15:54:12,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:12,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:12,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:12,020 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:12,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-15 15:54:12,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:54:12,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:12,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:12,523 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 160 treesize of output 126 [2022-03-15 15:54:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:12,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:13,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:13,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 242 treesize of output 204 [2022-03-15 15:54:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:13,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166818098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:13,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:13,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:54:13,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981989520] [2022-03-15 15:54:13,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:13,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:54:13,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:13,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:54:13,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:13,921 INFO L87 Difference]: Start difference. First operand 121 states and 242 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:54:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:14,394 INFO L93 Difference]: Finished difference Result 159 states and 302 transitions. [2022-03-15 15:54:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:54:14,394 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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 18 [2022-03-15 15:54:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:14,394 INFO L225 Difference]: With dead ends: 159 [2022-03-15 15:54:14,394 INFO L226 Difference]: Without dead ends: 152 [2022-03-15 15:54:14,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:54:14,394 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:14,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 179 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:54:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-15 15:54:14,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2022-03-15 15:54:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.024793388429752) internal successors, (245), 121 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 245 transitions. [2022-03-15 15:54:14,396 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 245 transitions. Word has length 18 [2022-03-15 15:54:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:14,396 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 245 transitions. [2022-03-15 15:54:14,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:54:14,396 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 245 transitions. [2022-03-15 15:54:14,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:14,396 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:14,396 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:14,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-03-15 15:54:14,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:14,597 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:14,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1660999865, now seen corresponding path program 228 times [2022-03-15 15:54:14,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:14,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484333607] [2022-03-15 15:54:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:14,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:14,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:14,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484333607] [2022-03-15 15:54:14,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484333607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:14,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145956267] [2022-03-15 15:54:14,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:14,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:14,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:14,814 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:14,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-15 15:54:14,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:54:14,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:14,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:14,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:15,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:15,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 130 [2022-03-15 15:54:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:15,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:16,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:16,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 236 treesize of output 202 [2022-03-15 15:54:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:16,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145956267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:16,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:16,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:54:16,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300509895] [2022-03-15 15:54:16,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:16,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:54:16,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:16,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:54:16,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:54:16,317 INFO L87 Difference]: Start difference. First operand 122 states and 245 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:54:16,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:16,590 INFO L93 Difference]: Finished difference Result 137 states and 266 transitions. [2022-03-15 15:54:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:54:16,590 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 18 [2022-03-15 15:54:16,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:16,590 INFO L225 Difference]: With dead ends: 137 [2022-03-15 15:54:16,590 INFO L226 Difference]: Without dead ends: 128 [2022-03-15 15:54:16,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:54:16,591 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:16,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 132 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 493 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-03-15 15:54:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-15 15:54:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2022-03-15 15:54:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.016949152542373) internal successors, (238), 118 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 238 transitions. [2022-03-15 15:54:16,592 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 238 transitions. Word has length 18 [2022-03-15 15:54:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:16,592 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 238 transitions. [2022-03-15 15:54:16,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:54:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 238 transitions. [2022-03-15 15:54:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:16,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:16,592 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:16,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-15 15:54:16,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:16,798 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:16,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1197623051, now seen corresponding path program 229 times [2022-03-15 15:54:16,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:16,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659387013] [2022-03-15 15:54:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:16,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:16,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659387013] [2022-03-15 15:54:16,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659387013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:16,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457390401] [2022-03-15 15:54:16,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:16,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:16,819 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:16,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-15 15:54:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 15:54:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:17,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 15:54:17,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457390401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:54:17,021 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 15:54:17,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-03-15 15:54:17,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847786140] [2022-03-15 15:54:17,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:54:17,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 15:54:17,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:17,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 15:54:17,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:54:17,021 INFO L87 Difference]: Start difference. First operand 119 states and 238 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:17,042 INFO L93 Difference]: Finished difference Result 129 states and 221 transitions. [2022-03-15 15:54:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 15:54:17,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:17,042 INFO L225 Difference]: With dead ends: 129 [2022-03-15 15:54:17,042 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 15:54:17,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 15:54:17,042 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:17,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 16 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:54:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 15:54:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2022-03-15 15:54:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.7142857142857142) internal successors, (132), 77 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 132 transitions. [2022-03-15 15:54:17,043 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 132 transitions. Word has length 18 [2022-03-15 15:54:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:17,043 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 132 transitions. [2022-03-15 15:54:17,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 132 transitions. [2022-03-15 15:54:17,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:17,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:17,043 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:17,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:17,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:17,255 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:17,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:17,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1097878791, now seen corresponding path program 230 times [2022-03-15 15:54:17,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:17,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345009600] [2022-03-15 15:54:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:17,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:17,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:17,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345009600] [2022-03-15 15:54:17,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345009600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:17,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497716799] [2022-03-15 15:54:17,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:17,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:17,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:17,439 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:17,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-15 15:54:17,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:17,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:17,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:17,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:54:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:18,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:18,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:18,832 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 223 treesize of output 191 [2022-03-15 15:54:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:19,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497716799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:19,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:19,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:54:19,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701067917] [2022-03-15 15:54:19,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:19,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:19,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:19,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:19,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:19,034 INFO L87 Difference]: Start difference. First operand 78 states and 132 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:19,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:19,252 INFO L93 Difference]: Finished difference Result 111 states and 180 transitions. [2022-03-15 15:54:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:54:19,252 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:19,252 INFO L225 Difference]: With dead ends: 111 [2022-03-15 15:54:19,252 INFO L226 Difference]: Without dead ends: 101 [2022-03-15 15:54:19,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:19,253 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:19,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 210 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 495 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-03-15 15:54:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-15 15:54:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2022-03-15 15:54:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.7073170731707317) internal successors, (140), 82 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 140 transitions. [2022-03-15 15:54:19,254 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 140 transitions. Word has length 18 [2022-03-15 15:54:19,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:19,254 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 140 transitions. [2022-03-15 15:54:19,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:19,254 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 140 transitions. [2022-03-15 15:54:19,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:19,254 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:19,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:19,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:19,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-03-15 15:54:19,470 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:19,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:19,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2140400561, now seen corresponding path program 231 times [2022-03-15 15:54:19,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:19,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421628868] [2022-03-15 15:54:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:19,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:19,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:19,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421628868] [2022-03-15 15:54:19,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421628868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:19,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38507880] [2022-03-15 15:54:19,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:19,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:19,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:19,621 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:19,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-15 15:54:19,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:19,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:19,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:19,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:20,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:20,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 130 [2022-03-15 15:54:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:20,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:20,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:20,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 176 [2022-03-15 15:54:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:21,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38507880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:21,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:21,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-03-15 15:54:21,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298810720] [2022-03-15 15:54:21,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:21,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:54:21,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:21,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:54:21,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:54:21,167 INFO L87 Difference]: Start difference. First operand 83 states and 140 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:21,815 INFO L93 Difference]: Finished difference Result 130 states and 204 transitions. [2022-03-15 15:54:21,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:54:21,816 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:21,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:21,816 INFO L225 Difference]: With dead ends: 130 [2022-03-15 15:54:21,816 INFO L226 Difference]: Without dead ends: 123 [2022-03-15 15:54:21,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:54:21,816 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:21,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 217 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 466 Invalid, 0 Unknown, 170 Unchecked, 0.2s Time] [2022-03-15 15:54:21,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-15 15:54:21,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 78. [2022-03-15 15:54:21,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.7142857142857142) internal successors, (132), 77 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 132 transitions. [2022-03-15 15:54:21,817 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 132 transitions. Word has length 18 [2022-03-15 15:54:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:21,818 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 132 transitions. [2022-03-15 15:54:21,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 132 transitions. [2022-03-15 15:54:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:21,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:21,818 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:21,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-03-15 15:54:22,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-03-15 15:54:22,018 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:22,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:22,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1202623349, now seen corresponding path program 232 times [2022-03-15 15:54:22,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:22,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321146086] [2022-03-15 15:54:22,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:22,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:22,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:22,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321146086] [2022-03-15 15:54:22,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321146086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:22,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713724793] [2022-03-15 15:54:22,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:22,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:22,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:22,234 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:22,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-15 15:54:22,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:22,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:22,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:22,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:22,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:22,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 144 [2022-03-15 15:54:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:22,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:23,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:23,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 204 [2022-03-15 15:54:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:23,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713724793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:23,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:23,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:54:23,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217954834] [2022-03-15 15:54:23,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:23,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:23,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:23,464 INFO L87 Difference]: Start difference. First operand 78 states and 132 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:23,793 INFO L93 Difference]: Finished difference Result 121 states and 190 transitions. [2022-03-15 15:54:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:54:23,793 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:23,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:23,794 INFO L225 Difference]: With dead ends: 121 [2022-03-15 15:54:23,794 INFO L226 Difference]: Without dead ends: 111 [2022-03-15 15:54:23,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:23,794 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:23,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 151 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 439 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-03-15 15:54:23,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-15 15:54:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 81. [2022-03-15 15:54:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.7125) internal successors, (137), 80 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:23,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 137 transitions. [2022-03-15 15:54:23,795 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 137 transitions. Word has length 18 [2022-03-15 15:54:23,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:23,795 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 137 transitions. [2022-03-15 15:54:23,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:23,795 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 137 transitions. [2022-03-15 15:54:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:23,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:23,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:23,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:23,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-03-15 15:54:23,996 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:23,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:23,996 INFO L85 PathProgramCache]: Analyzing trace with hash -358614969, now seen corresponding path program 233 times [2022-03-15 15:54:23,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:23,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914144153] [2022-03-15 15:54:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:23,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:24,217 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:24,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914144153] [2022-03-15 15:54:24,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914144153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:24,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475710463] [2022-03-15 15:54:24,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:24,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:24,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:24,218 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:24,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-15 15:54:24,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:54:24,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:24,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:24,647 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 159 treesize of output 125 [2022-03-15 15:54:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:24,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:25,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:25,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 201 [2022-03-15 15:54:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:25,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475710463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:25,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:25,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 26 [2022-03-15 15:54:25,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859062713] [2022-03-15 15:54:25,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:25,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:25,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:25,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:25,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:25,605 INFO L87 Difference]: Start difference. First operand 81 states and 137 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:25,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:25,852 INFO L93 Difference]: Finished difference Result 109 states and 174 transitions. [2022-03-15 15:54:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:54:25,852 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:25,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:25,852 INFO L225 Difference]: With dead ends: 109 [2022-03-15 15:54:25,852 INFO L226 Difference]: Without dead ends: 98 [2022-03-15 15:54:25,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:54:25,853 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:25,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 125 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-15 15:54:25,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2022-03-15 15:54:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 79 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 135 transitions. [2022-03-15 15:54:25,854 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 135 transitions. Word has length 18 [2022-03-15 15:54:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:25,854 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 135 transitions. [2022-03-15 15:54:25,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 135 transitions. [2022-03-15 15:54:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:25,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:25,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:25,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-03-15 15:54:26,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-03-15 15:54:26,067 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:26,068 INFO L85 PathProgramCache]: Analyzing trace with hash 946173187, now seen corresponding path program 234 times [2022-03-15 15:54:26,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:26,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110092116] [2022-03-15 15:54:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:26,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:54:26,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:26,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110092116] [2022-03-15 15:54:26,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110092116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:26,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491986175] [2022-03-15 15:54:26,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:26,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:26,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:26,335 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:26,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-15 15:54:26,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:54:26,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:26,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:26,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:26,705 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 164 treesize of output 130 [2022-03-15 15:54:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:26,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:27,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:27,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 212 [2022-03-15 15:54:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:54:27,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491986175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:27,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:27,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 26 [2022-03-15 15:54:27,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138992486] [2022-03-15 15:54:27,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:27,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:27,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:27,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:27,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:27,617 INFO L87 Difference]: Start difference. First operand 80 states and 135 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:27,910 INFO L93 Difference]: Finished difference Result 105 states and 168 transitions. [2022-03-15 15:54:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:54:27,910 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:27,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:27,910 INFO L225 Difference]: With dead ends: 105 [2022-03-15 15:54:27,910 INFO L226 Difference]: Without dead ends: 95 [2022-03-15 15:54:27,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:54:27,910 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:27,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 132 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-15 15:54:27,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2022-03-15 15:54:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 79 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 135 transitions. [2022-03-15 15:54:27,911 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 135 transitions. Word has length 18 [2022-03-15 15:54:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:27,911 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 135 transitions. [2022-03-15 15:54:27,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:27,912 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 135 transitions. [2022-03-15 15:54:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:27,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:27,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:27,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:28,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:28,128 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:28,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1790181567, now seen corresponding path program 235 times [2022-03-15 15:54:28,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:28,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523927344] [2022-03-15 15:54:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:28,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:54:28,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:28,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523927344] [2022-03-15 15:54:28,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523927344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:28,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678820308] [2022-03-15 15:54:28,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:28,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:28,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:28,290 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:28,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-15 15:54:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:28,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:28,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:28,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:28,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 144 [2022-03-15 15:54:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:28,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:29,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:29,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 200 [2022-03-15 15:54:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:54:29,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678820308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:29,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:29,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:54:29,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024084254] [2022-03-15 15:54:29,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:29,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:29,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:29,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:29,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:29,698 INFO L87 Difference]: Start difference. First operand 80 states and 135 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:29,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:29,981 INFO L93 Difference]: Finished difference Result 104 states and 165 transitions. [2022-03-15 15:54:29,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:54:29,981 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:29,982 INFO L225 Difference]: With dead ends: 104 [2022-03-15 15:54:29,982 INFO L226 Difference]: Without dead ends: 94 [2022-03-15 15:54:29,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:54:29,982 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:29,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 130 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-15 15:54:29,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2022-03-15 15:54:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.7) internal successors, (136), 80 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 136 transitions. [2022-03-15 15:54:29,983 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 136 transitions. Word has length 18 [2022-03-15 15:54:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:29,983 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 136 transitions. [2022-03-15 15:54:29,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 136 transitions. [2022-03-15 15:54:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:29,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:29,983 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:30,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-03-15 15:54:30,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2022-03-15 15:54:30,191 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:30,191 INFO L85 PathProgramCache]: Analyzing trace with hash -270678235, now seen corresponding path program 236 times [2022-03-15 15:54:30,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:30,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196184785] [2022-03-15 15:54:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:30,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:54:30,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:30,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196184785] [2022-03-15 15:54:30,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196184785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:30,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061576554] [2022-03-15 15:54:30,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:30,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:30,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:30,443 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:30,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-15 15:54:30,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:30,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:30,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:30,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:30,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:30,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 134 [2022-03-15 15:54:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:31,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:31,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:31,476 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 235 treesize of output 203 [2022-03-15 15:54:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:54:31,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061576554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:31,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:31,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:54:31,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932064195] [2022-03-15 15:54:31,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:31,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:54:31,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:31,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:54:31,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:54:31,629 INFO L87 Difference]: Start difference. First operand 81 states and 136 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:31,843 INFO L93 Difference]: Finished difference Result 92 states and 150 transitions. [2022-03-15 15:54:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:54:31,843 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:31,843 INFO L225 Difference]: With dead ends: 92 [2022-03-15 15:54:31,843 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 15:54:31,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:54:31,844 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:31,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 105 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:54:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 15:54:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-15 15:54:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.705128205128205) internal successors, (133), 78 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 133 transitions. [2022-03-15 15:54:31,844 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 133 transitions. Word has length 18 [2022-03-15 15:54:31,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:31,845 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 133 transitions. [2022-03-15 15:54:31,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 133 transitions. [2022-03-15 15:54:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:31,845 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:31,845 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:31,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-03-15 15:54:32,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-15 15:54:32,053 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:32,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:32,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1160610933, now seen corresponding path program 237 times [2022-03-15 15:54:32,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:32,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954813668] [2022-03-15 15:54:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:32,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:32,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:32,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954813668] [2022-03-15 15:54:32,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954813668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:32,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990175721] [2022-03-15 15:54:32,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:32,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:32,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:32,496 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:32,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-15 15:54:32,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:32,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:32,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:32,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:33,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:33,612 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 118 [2022-03-15 15:54:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:33,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:34,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:34,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 175 [2022-03-15 15:54:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:34,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990175721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:34,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:34,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:54:34,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719576566] [2022-03-15 15:54:34,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:34,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:54:34,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:34,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:54:34,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:34,969 INFO L87 Difference]: Start difference. First operand 79 states and 133 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:54:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:35,411 INFO L93 Difference]: Finished difference Result 105 states and 168 transitions. [2022-03-15 15:54:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:54:35,412 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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 18 [2022-03-15 15:54:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:35,412 INFO L225 Difference]: With dead ends: 105 [2022-03-15 15:54:35,412 INFO L226 Difference]: Without dead ends: 95 [2022-03-15 15:54:35,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:54:35,412 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:35,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 185 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 487 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-03-15 15:54:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-15 15:54:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2022-03-15 15:54:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.705128205128205) internal successors, (133), 78 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 133 transitions. [2022-03-15 15:54:35,413 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 133 transitions. Word has length 18 [2022-03-15 15:54:35,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:35,413 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 133 transitions. [2022-03-15 15:54:35,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:54:35,414 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 133 transitions. [2022-03-15 15:54:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:35,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:35,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:35,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:35,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:35,614 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash -316602553, now seen corresponding path program 238 times [2022-03-15 15:54:35,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:35,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046106701] [2022-03-15 15:54:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:35,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:35,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:35,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046106701] [2022-03-15 15:54:35,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046106701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:35,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525256623] [2022-03-15 15:54:35,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:35,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:35,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:35,941 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:35,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-15 15:54:36,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:36,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:36,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:36,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:36,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:36,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 141 [2022-03-15 15:54:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:36,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:37,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:37,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 174 [2022-03-15 15:54:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:37,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525256623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:37,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:37,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:54:37,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758967609] [2022-03-15 15:54:37,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:37,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:37,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:37,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:37,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:37,641 INFO L87 Difference]: Start difference. First operand 79 states and 133 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:54:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:37,944 INFO L93 Difference]: Finished difference Result 106 states and 168 transitions. [2022-03-15 15:54:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:54:37,944 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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 18 [2022-03-15 15:54:37,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:37,944 INFO L225 Difference]: With dead ends: 106 [2022-03-15 15:54:37,944 INFO L226 Difference]: Without dead ends: 96 [2022-03-15 15:54:37,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:54:37,944 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:37,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 132 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:37,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-15 15:54:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2022-03-15 15:54:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.7) internal successors, (136), 80 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 136 transitions. [2022-03-15 15:54:37,945 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 136 transitions. Word has length 18 [2022-03-15 15:54:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:37,945 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 136 transitions. [2022-03-15 15:54:37,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:54:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 136 transitions. [2022-03-15 15:54:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:37,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:37,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:37,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:38,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:38,146 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1917504941, now seen corresponding path program 239 times [2022-03-15 15:54:38,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:38,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248865516] [2022-03-15 15:54:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:38,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:38,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:38,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248865516] [2022-03-15 15:54:38,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248865516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:38,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758137125] [2022-03-15 15:54:38,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:38,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:38,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:38,341 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:38,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-15 15:54:38,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:54:38,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:38,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:38,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:39,010 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 166 treesize of output 132 [2022-03-15 15:54:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:39,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:39,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:39,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:54:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:40,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758137125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:40,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:40,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:54:40,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981648384] [2022-03-15 15:54:40,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:40,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:54:40,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:40,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:54:40,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:40,148 INFO L87 Difference]: Start difference. First operand 81 states and 136 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:54:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:40,445 INFO L93 Difference]: Finished difference Result 96 states and 156 transitions. [2022-03-15 15:54:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:54:40,445 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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 18 [2022-03-15 15:54:40,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:40,445 INFO L225 Difference]: With dead ends: 96 [2022-03-15 15:54:40,445 INFO L226 Difference]: Without dead ends: 84 [2022-03-15 15:54:40,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:54:40,445 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:40,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 154 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-15 15:54:40,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-03-15 15:54:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 79 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 134 transitions. [2022-03-15 15:54:40,446 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 134 transitions. Word has length 18 [2022-03-15 15:54:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:40,446 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 134 transitions. [2022-03-15 15:54:40,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:54:40,446 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2022-03-15 15:54:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:40,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:40,447 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:40,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-03-15 15:54:40,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:40,647 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:40,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1839606777, now seen corresponding path program 240 times [2022-03-15 15:54:40,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:40,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137195624] [2022-03-15 15:54:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:40,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:40,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:40,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137195624] [2022-03-15 15:54:40,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137195624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:40,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798108786] [2022-03-15 15:54:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:40,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:40,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:40,856 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:40,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-15 15:54:41,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:54:41,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:41,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:41,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:41,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:41,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 140 [2022-03-15 15:54:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:41,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:42,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:42,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 219 [2022-03-15 15:54:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:42,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798108786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:42,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:42,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 15:54:42,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156864899] [2022-03-15 15:54:42,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:42,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:54:42,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:42,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:54:42,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:54:42,739 INFO L87 Difference]: Start difference. First operand 80 states and 134 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:43,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:43,593 INFO L93 Difference]: Finished difference Result 116 states and 185 transitions. [2022-03-15 15:54:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:54:43,594 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:43,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:43,594 INFO L225 Difference]: With dead ends: 116 [2022-03-15 15:54:43,594 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 15:54:43,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:54:43,594 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 156 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:43,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 169 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 489 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-03-15 15:54:43,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 15:54:43,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2022-03-15 15:54:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.726027397260274) internal successors, (126), 73 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 126 transitions. [2022-03-15 15:54:43,595 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 126 transitions. Word has length 18 [2022-03-15 15:54:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:43,595 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 126 transitions. [2022-03-15 15:54:43,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 126 transitions. [2022-03-15 15:54:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:43,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:43,596 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:43,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:43,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2022-03-15 15:54:43,796 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:43,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:43,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1704894631, now seen corresponding path program 241 times [2022-03-15 15:54:43,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:43,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943128449] [2022-03-15 15:54:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:43,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:43,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:43,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943128449] [2022-03-15 15:54:43,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943128449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:43,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871755293] [2022-03-15 15:54:43,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:43,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:43,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:43,961 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:43,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-15 15:54:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:44,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:44,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:44,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:44,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 15:54:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:44,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:45,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:45,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:54:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:45,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871755293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:45,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:45,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:54:45,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091690352] [2022-03-15 15:54:45,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:45,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:54:45,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:45,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:54:45,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:45,422 INFO L87 Difference]: Start difference. First operand 74 states and 126 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:45,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:45,560 INFO L93 Difference]: Finished difference Result 100 states and 170 transitions. [2022-03-15 15:54:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:54:45,561 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:45,561 INFO L225 Difference]: With dead ends: 100 [2022-03-15 15:54:45,561 INFO L226 Difference]: Without dead ends: 93 [2022-03-15 15:54:45,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:54:45,561 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:45,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 214 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 283 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2022-03-15 15:54:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-15 15:54:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2022-03-15 15:54:45,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.7349397590361446) internal successors, (144), 83 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 144 transitions. [2022-03-15 15:54:45,562 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 144 transitions. Word has length 18 [2022-03-15 15:54:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:45,562 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 144 transitions. [2022-03-15 15:54:45,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 144 transitions. [2022-03-15 15:54:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:45,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:45,563 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:45,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:45,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-15 15:54:45,771 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:45,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:45,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1506486571, now seen corresponding path program 242 times [2022-03-15 15:54:45,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:45,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551345010] [2022-03-15 15:54:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:45,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:46,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:46,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551345010] [2022-03-15 15:54:46,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551345010] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:46,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282410240] [2022-03-15 15:54:46,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:54:46,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:46,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:46,122 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:46,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-15 15:54:46,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:54:46,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:46,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:46,573 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 151 treesize of output 123 [2022-03-15 15:54:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:46,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:47,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:47,305 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 252 treesize of output 206 [2022-03-15 15:54:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:47,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282410240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:47,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:47,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:54:47,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576224195] [2022-03-15 15:54:47,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:47,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:54:47,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:47,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:54:47,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:54:47,511 INFO L87 Difference]: Start difference. First operand 84 states and 144 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:47,784 INFO L93 Difference]: Finished difference Result 118 states and 191 transitions. [2022-03-15 15:54:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:54:47,785 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:47,785 INFO L225 Difference]: With dead ends: 118 [2022-03-15 15:54:47,785 INFO L226 Difference]: Without dead ends: 103 [2022-03-15 15:54:47,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:47,786 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:47,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 216 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:47,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-15 15:54:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2022-03-15 15:54:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.72) internal successors, (129), 75 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 129 transitions. [2022-03-15 15:54:47,787 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 129 transitions. Word has length 18 [2022-03-15 15:54:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:47,787 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 129 transitions. [2022-03-15 15:54:47,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:47,787 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 129 transitions. [2022-03-15 15:54:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:47,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:47,787 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:47,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:48,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:48,004 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:48,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:48,005 INFO L85 PathProgramCache]: Analyzing trace with hash -579293731, now seen corresponding path program 243 times [2022-03-15 15:54:48,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:48,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969591358] [2022-03-15 15:54:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:48,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:48,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:48,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969591358] [2022-03-15 15:54:48,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969591358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:48,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136801136] [2022-03-15 15:54:48,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:54:48,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:48,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:48,223 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:48,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-15 15:54:48,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:54:48,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:48,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:48,776 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 142 treesize of output 114 [2022-03-15 15:54:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:48,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:49,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:49,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:54:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:49,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136801136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:49,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:49,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:54:49,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029893681] [2022-03-15 15:54:49,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:49,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:54:49,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:49,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:54:49,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:49,791 INFO L87 Difference]: Start difference. First operand 76 states and 129 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:54:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:50,434 INFO L93 Difference]: Finished difference Result 133 states and 213 transitions. [2022-03-15 15:54:50,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:54:50,434 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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 18 [2022-03-15 15:54:50,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:50,435 INFO L225 Difference]: With dead ends: 133 [2022-03-15 15:54:50,435 INFO L226 Difference]: Without dead ends: 101 [2022-03-15 15:54:50,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:54:50,435 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:50,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 289 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:54:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-15 15:54:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2022-03-15 15:54:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.7142857142857142) internal successors, (132), 77 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 132 transitions. [2022-03-15 15:54:50,436 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 132 transitions. Word has length 18 [2022-03-15 15:54:50,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:50,436 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 132 transitions. [2022-03-15 15:54:50,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:54:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 132 transitions. [2022-03-15 15:54:50,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:50,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:50,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:50,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:50,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-03-15 15:54:50,637 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:50,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1119583961, now seen corresponding path program 244 times [2022-03-15 15:54:50,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:50,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312758330] [2022-03-15 15:54:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:50,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:50,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:50,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312758330] [2022-03-15 15:54:50,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312758330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:50,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432087634] [2022-03-15 15:54:50,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:54:50,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:50,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:50,968 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:50,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-15 15:54:51,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:54:51,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:51,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:51,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:51,579 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 142 treesize of output 114 [2022-03-15 15:54:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:51,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:52,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:52,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:54:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:52,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432087634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:52,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:52,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:54:52,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640487682] [2022-03-15 15:54:52,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:52,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:54:52,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:52,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:54:52,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:54:52,630 INFO L87 Difference]: Start difference. First operand 78 states and 132 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:54:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:53,064 INFO L93 Difference]: Finished difference Result 125 states and 198 transitions. [2022-03-15 15:54:53,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:54:53,064 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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 18 [2022-03-15 15:54:53,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:53,065 INFO L225 Difference]: With dead ends: 125 [2022-03-15 15:54:53,065 INFO L226 Difference]: Without dead ends: 99 [2022-03-15 15:54:53,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:54:53,065 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:53,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 217 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-15 15:54:53,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 77. [2022-03-15 15:54:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.7105263157894737) internal successors, (130), 76 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 130 transitions. [2022-03-15 15:54:53,066 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 130 transitions. Word has length 18 [2022-03-15 15:54:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:53,066 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 130 transitions. [2022-03-15 15:54:53,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 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) [2022-03-15 15:54:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 130 transitions. [2022-03-15 15:54:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:53,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:53,066 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:53,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:53,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-15 15:54:53,273 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1180918179, now seen corresponding path program 245 times [2022-03-15 15:54:53,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:53,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656751903] [2022-03-15 15:54:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:53,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:53,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:53,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656751903] [2022-03-15 15:54:53,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656751903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:53,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086149884] [2022-03-15 15:54:53,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:54:53,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:53,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:53,599 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:53,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-15 15:54:53,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:54:53,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:53,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:53,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:54,241 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 140 treesize of output 112 [2022-03-15 15:54:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:54,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:55,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:55,496 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 263 treesize of output 213 [2022-03-15 15:54:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:55,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086149884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:55,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:55,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-03-15 15:54:55,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583454815] [2022-03-15 15:54:55,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:55,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:54:55,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:55,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:54:55,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:54:55,679 INFO L87 Difference]: Start difference. First operand 77 states and 130 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:56,241 INFO L93 Difference]: Finished difference Result 141 states and 212 transitions. [2022-03-15 15:54:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:54:56,242 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:56,242 INFO L225 Difference]: With dead ends: 141 [2022-03-15 15:54:56,242 INFO L226 Difference]: Without dead ends: 121 [2022-03-15 15:54:56,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:54:56,242 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:56,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 279 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:54:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-15 15:54:56,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 80. [2022-03-15 15:54:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 79 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 134 transitions. [2022-03-15 15:54:56,244 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 134 transitions. Word has length 18 [2022-03-15 15:54:56,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:56,244 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 134 transitions. [2022-03-15 15:54:56,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2022-03-15 15:54:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:56,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:56,244 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:56,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:56,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-03-15 15:54:56,457 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:56,457 INFO L85 PathProgramCache]: Analyzing trace with hash -336909799, now seen corresponding path program 246 times [2022-03-15 15:54:56,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:56,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355724180] [2022-03-15 15:54:56,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:56,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:56,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:56,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355724180] [2022-03-15 15:54:56,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355724180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:56,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241801516] [2022-03-15 15:54:56,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:54:56,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:56,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:56,743 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:56,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-15 15:54:56,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:54:56,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:54:56,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:54:57,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:54:57,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 118 [2022-03-15 15:54:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:57,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:54:58,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:54:58,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 182 [2022-03-15 15:54:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:58,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241801516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:54:58,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:54:58,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 15:54:58,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165669736] [2022-03-15 15:54:58,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:54:58,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:54:58,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:54:58,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:54:58,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:54:58,641 INFO L87 Difference]: Start difference. First operand 80 states and 134 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:54:59,199 INFO L93 Difference]: Finished difference Result 163 states and 254 transitions. [2022-03-15 15:54:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:54:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:54:59,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:54:59,200 INFO L225 Difference]: With dead ends: 163 [2022-03-15 15:54:59,200 INFO L226 Difference]: Without dead ends: 150 [2022-03-15 15:54:59,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=239, Invalid=1567, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:54:59,200 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 76 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:54:59,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 173 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 341 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-03-15 15:54:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-15 15:54:59,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 78. [2022-03-15 15:54:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 77 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 131 transitions. [2022-03-15 15:54:59,201 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 131 transitions. Word has length 18 [2022-03-15 15:54:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:54:59,201 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 131 transitions. [2022-03-15 15:54:59,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:54:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 131 transitions. [2022-03-15 15:54:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:54:59,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:54:59,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:54:59,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-03-15 15:54:59,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:59,419 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:54:59,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:54:59,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2066716459, now seen corresponding path program 247 times [2022-03-15 15:54:59,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:54:59,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149106786] [2022-03-15 15:54:59,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:54:59,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:54:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:54:59,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:54:59,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149106786] [2022-03-15 15:54:59,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149106786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:54:59,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829334008] [2022-03-15 15:54:59,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:54:59,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:54:59,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:54:59,791 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:54:59,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-15 15:54:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:54:59,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:54:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:00,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:00,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 144 [2022-03-15 15:55:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:00,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:01,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:01,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:55:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:01,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829334008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:01,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:01,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 24 [2022-03-15 15:55:01,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727601438] [2022-03-15 15:55:01,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:01,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:01,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:01,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:01,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:01,519 INFO L87 Difference]: Start difference. First operand 78 states and 131 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:01,940 INFO L93 Difference]: Finished difference Result 105 states and 165 transitions. [2022-03-15 15:55:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:55:01,940 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:01,940 INFO L225 Difference]: With dead ends: 105 [2022-03-15 15:55:01,940 INFO L226 Difference]: Without dead ends: 95 [2022-03-15 15:55:01,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:55:01,941 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:01,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 103 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 360 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-15 15:55:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-15 15:55:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2022-03-15 15:55:01,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.7012987012987013) internal successors, (131), 77 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 131 transitions. [2022-03-15 15:55:01,942 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 131 transitions. Word has length 18 [2022-03-15 15:55:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:01,942 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 131 transitions. [2022-03-15 15:55:01,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 131 transitions. [2022-03-15 15:55:01,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:01,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:01,942 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:01,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:02,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:02,155 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:02,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1222708079, now seen corresponding path program 248 times [2022-03-15 15:55:02,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:02,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186584228] [2022-03-15 15:55:02,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:02,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:02,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:02,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186584228] [2022-03-15 15:55:02,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186584228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:02,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656752324] [2022-03-15 15:55:02,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:02,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:02,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:02,335 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:02,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-15 15:55:02,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:02,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:02,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:02,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:02,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:02,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 143 [2022-03-15 15:55:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:03,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:03,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:03,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 174 [2022-03-15 15:55:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:04,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656752324] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:04,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:04,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:55:04,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805157683] [2022-03-15 15:55:04,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:04,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:04,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:04,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:04,061 INFO L87 Difference]: Start difference. First operand 78 states and 131 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:04,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:04,772 INFO L93 Difference]: Finished difference Result 91 states and 147 transitions. [2022-03-15 15:55:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:55:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:04,773 INFO L225 Difference]: With dead ends: 91 [2022-03-15 15:55:04,773 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:55:04,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:55:04,773 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:04,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 99 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 382 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-03-15 15:55:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:55:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-03-15 15:55:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.6933333333333334) internal successors, (127), 75 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 127 transitions. [2022-03-15 15:55:04,774 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 127 transitions. Word has length 18 [2022-03-15 15:55:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:04,774 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 127 transitions. [2022-03-15 15:55:04,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 127 transitions. [2022-03-15 15:55:04,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:04,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:04,775 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:04,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:04,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:04,975 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:04,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2024704043, now seen corresponding path program 249 times [2022-03-15 15:55:04,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:04,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677187058] [2022-03-15 15:55:04,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:04,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:05,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:05,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677187058] [2022-03-15 15:55:05,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677187058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:05,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660983383] [2022-03-15 15:55:05,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:05,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:05,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:05,245 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:05,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-15 15:55:05,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:55:05,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:05,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:05,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:05,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:05,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 116 [2022-03-15 15:55:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:05,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:06,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:06,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 200 [2022-03-15 15:55:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:06,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660983383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:06,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:06,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 15:55:06,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962095478] [2022-03-15 15:55:06,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:06,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:55:06,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:06,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:55:06,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:06,941 INFO L87 Difference]: Start difference. First operand 76 states and 127 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:08,171 INFO L93 Difference]: Finished difference Result 271 states and 402 transitions. [2022-03-15 15:55:08,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:55:08,171 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:08,171 INFO L225 Difference]: With dead ends: 271 [2022-03-15 15:55:08,171 INFO L226 Difference]: Without dead ends: 251 [2022-03-15 15:55:08,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=391, Invalid=2159, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 15:55:08,172 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 250 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:08,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 312 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:08,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-15 15:55:08,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 76. [2022-03-15 15:55:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.6933333333333334) internal successors, (127), 75 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 127 transitions. [2022-03-15 15:55:08,173 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 127 transitions. Word has length 18 [2022-03-15 15:55:08,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:08,173 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 127 transitions. [2022-03-15 15:55:08,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 127 transitions. [2022-03-15 15:55:08,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:08,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:08,174 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:08,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-03-15 15:55:08,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:08,387 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:08,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1180695663, now seen corresponding path program 250 times [2022-03-15 15:55:08,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:08,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968308636] [2022-03-15 15:55:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:08,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:08,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:08,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968308636] [2022-03-15 15:55:08,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968308636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:08,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610805118] [2022-03-15 15:55:08,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:08,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:08,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:08,562 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:08,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-15 15:55:08,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:08,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:08,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:08,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:09,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:09,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 123 [2022-03-15 15:55:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:09,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:10,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:10,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 208 [2022-03-15 15:55:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:10,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610805118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:10,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:10,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:55:10,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817301393] [2022-03-15 15:55:10,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:10,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:10,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:10,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:10,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:10,211 INFO L87 Difference]: Start difference. First operand 76 states and 127 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:55:10,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:10,530 INFO L93 Difference]: Finished difference Result 128 states and 193 transitions. [2022-03-15 15:55:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:55:10,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 18 [2022-03-15 15:55:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:10,530 INFO L225 Difference]: With dead ends: 128 [2022-03-15 15:55:10,530 INFO L226 Difference]: Without dead ends: 108 [2022-03-15 15:55:10,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:55:10,531 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:10,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 108 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:10,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-15 15:55:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2022-03-15 15:55:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.6842105263157894) internal successors, (128), 76 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 128 transitions. [2022-03-15 15:55:10,532 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 128 transitions. Word has length 18 [2022-03-15 15:55:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:10,532 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 128 transitions. [2022-03-15 15:55:10,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:55:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 128 transitions. [2022-03-15 15:55:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:10,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:10,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:10,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:10,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:10,735 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:10,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:10,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1053411831, now seen corresponding path program 251 times [2022-03-15 15:55:10,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:10,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598644318] [2022-03-15 15:55:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:10,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:10,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:10,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598644318] [2022-03-15 15:55:10,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598644318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:10,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548958250] [2022-03-15 15:55:10,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:10,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:10,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:10,914 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:10,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-15 15:55:11,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:55:11,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:11,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:11,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:11,335 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 142 treesize of output 114 [2022-03-15 15:55:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:11,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:11,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:11,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 204 [2022-03-15 15:55:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:12,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548958250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:12,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:12,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:55:12,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549760736] [2022-03-15 15:55:12,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:12,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:55:12,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:55:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:55:12,026 INFO L87 Difference]: Start difference. First operand 77 states and 128 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:12,396 INFO L93 Difference]: Finished difference Result 94 states and 150 transitions. [2022-03-15 15:55:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:55:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:12,397 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:55:12,397 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 15:55:12,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:55:12,397 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:12,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 109 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 15:55:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-03-15 15:55:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.6944444444444444) internal successors, (122), 72 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 122 transitions. [2022-03-15 15:55:12,398 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 122 transitions. Word has length 18 [2022-03-15 15:55:12,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:12,398 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 122 transitions. [2022-03-15 15:55:12,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:12,398 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 122 transitions. [2022-03-15 15:55:12,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:12,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:12,398 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:12,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:12,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:12,599 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:12,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash -153772327, now seen corresponding path program 252 times [2022-03-15 15:55:12,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:12,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400207581] [2022-03-15 15:55:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:12,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:12,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400207581] [2022-03-15 15:55:12,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400207581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:12,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588377630] [2022-03-15 15:55:12,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:12,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:12,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:12,750 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:12,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-15 15:55:12,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:55:12,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:12,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:12,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:13,231 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 142 treesize of output 114 [2022-03-15 15:55:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:13,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:13,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:13,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 191 [2022-03-15 15:55:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:14,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588377630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:14,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:14,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 27 [2022-03-15 15:55:14,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102098336] [2022-03-15 15:55:14,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:14,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:14,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:14,048 INFO L87 Difference]: Start difference. First operand 73 states and 122 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 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) [2022-03-15 15:55:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:14,452 INFO L93 Difference]: Finished difference Result 115 states and 185 transitions. [2022-03-15 15:55:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:55:14,453 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 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 18 [2022-03-15 15:55:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:14,453 INFO L225 Difference]: With dead ends: 115 [2022-03-15 15:55:14,453 INFO L226 Difference]: Without dead ends: 99 [2022-03-15 15:55:14,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:55:14,453 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:14,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 175 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-15 15:55:14,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2022-03-15 15:55:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.6986301369863013) internal successors, (124), 73 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 124 transitions. [2022-03-15 15:55:14,455 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 124 transitions. Word has length 18 [2022-03-15 15:55:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:14,455 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 124 transitions. [2022-03-15 15:55:14,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 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) [2022-03-15 15:55:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 124 transitions. [2022-03-15 15:55:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:14,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:14,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:14,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:14,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:14,672 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1840692829, now seen corresponding path program 253 times [2022-03-15 15:55:14,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:14,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129029518] [2022-03-15 15:55:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:14,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:14,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:14,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129029518] [2022-03-15 15:55:14,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129029518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:14,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352246512] [2022-03-15 15:55:14,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:14,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:14,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:14,933 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:14,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-15 15:55:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:15,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:15,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:15,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:15,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 144 [2022-03-15 15:55:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:15,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:16,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:16,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 174 [2022-03-15 15:55:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:16,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352246512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:16,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:16,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:55:16,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398374982] [2022-03-15 15:55:16,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:16,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:16,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:16,432 INFO L87 Difference]: Start difference. First operand 74 states and 124 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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) [2022-03-15 15:55:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:16,724 INFO L93 Difference]: Finished difference Result 117 states and 182 transitions. [2022-03-15 15:55:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:55:16,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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 18 [2022-03-15 15:55:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:16,725 INFO L225 Difference]: With dead ends: 117 [2022-03-15 15:55:16,725 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 15:55:16,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:16,725 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:16,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 126 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 373 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-03-15 15:55:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 15:55:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2022-03-15 15:55:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.6973684210526316) internal successors, (129), 76 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 129 transitions. [2022-03-15 15:55:16,726 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 129 transitions. Word has length 18 [2022-03-15 15:55:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:16,726 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 129 transitions. [2022-03-15 15:55:16,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 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) [2022-03-15 15:55:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 129 transitions. [2022-03-15 15:55:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:16,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:16,726 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:16,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-03-15 15:55:16,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-03-15 15:55:16,943 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:16,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1610266087, now seen corresponding path program 254 times [2022-03-15 15:55:16,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:16,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313431154] [2022-03-15 15:55:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:16,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:17,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:17,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313431154] [2022-03-15 15:55:17,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313431154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:17,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626112035] [2022-03-15 15:55:17,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:17,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:17,139 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:17,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-15 15:55:17,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:17,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:17,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:17,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:17,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:17,533 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 116 [2022-03-15 15:55:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:17,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:18,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:18,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 172 [2022-03-15 15:55:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:18,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626112035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:18,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:18,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2022-03-15 15:55:18,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26725998] [2022-03-15 15:55:18,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:18,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:18,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:18,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:18,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:18,467 INFO L87 Difference]: Start difference. First operand 77 states and 129 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:55:18,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:18,830 INFO L93 Difference]: Finished difference Result 105 states and 166 transitions. [2022-03-15 15:55:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:55:18,831 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 18 [2022-03-15 15:55:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:18,831 INFO L225 Difference]: With dead ends: 105 [2022-03-15 15:55:18,831 INFO L226 Difference]: Without dead ends: 94 [2022-03-15 15:55:18,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:55:18,831 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:18,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 143 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 397 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-03-15 15:55:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-15 15:55:18,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2022-03-15 15:55:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.6933333333333334) internal successors, (127), 75 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 127 transitions. [2022-03-15 15:55:18,833 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 127 transitions. Word has length 18 [2022-03-15 15:55:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:18,833 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 127 transitions. [2022-03-15 15:55:18,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:55:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 127 transitions. [2022-03-15 15:55:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:18,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:18,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:18,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-03-15 15:55:19,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-03-15 15:55:19,043 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash -305477931, now seen corresponding path program 255 times [2022-03-15 15:55:19,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:19,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251882919] [2022-03-15 15:55:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:19,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:19,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:19,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251882919] [2022-03-15 15:55:19,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251882919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:19,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316523681] [2022-03-15 15:55:19,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:19,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:19,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:19,240 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:19,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-15 15:55:19,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:55:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:19,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:19,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:19,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 146 [2022-03-15 15:55:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:19,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:20,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:20,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 173 [2022-03-15 15:55:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:20,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316523681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:20,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:20,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-03-15 15:55:20,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568124523] [2022-03-15 15:55:20,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:20,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:55:20,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:20,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:55:20,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:20,590 INFO L87 Difference]: Start difference. First operand 76 states and 127 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:21,109 INFO L93 Difference]: Finished difference Result 187 states and 284 transitions. [2022-03-15 15:55:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:55:21,110 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:21,110 INFO L225 Difference]: With dead ends: 187 [2022-03-15 15:55:21,110 INFO L226 Difference]: Without dead ends: 177 [2022-03-15 15:55:21,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:55:21,110 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 126 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:21,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 244 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 579 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-03-15 15:55:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-15 15:55:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 79. [2022-03-15 15:55:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.705128205128205) internal successors, (133), 78 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 133 transitions. [2022-03-15 15:55:21,112 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 133 transitions. Word has length 18 [2022-03-15 15:55:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:21,112 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 133 transitions. [2022-03-15 15:55:21,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 133 transitions. [2022-03-15 15:55:21,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:21,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:21,112 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:21,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:21,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-15 15:55:21,327 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:21,328 INFO L85 PathProgramCache]: Analyzing trace with hash 538530449, now seen corresponding path program 256 times [2022-03-15 15:55:21,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:21,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361216712] [2022-03-15 15:55:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:21,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:21,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:21,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361216712] [2022-03-15 15:55:21,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361216712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:21,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083968542] [2022-03-15 15:55:21,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:21,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:21,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:21,474 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:21,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-15 15:55:21,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:21,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:21,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:21,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:21,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:21,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 123 [2022-03-15 15:55:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:22,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:22,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:22,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 174 [2022-03-15 15:55:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:22,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083968542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:22,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:22,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 26 [2022-03-15 15:55:22,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164546404] [2022-03-15 15:55:22,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:22,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:22,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:22,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:22,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:22,873 INFO L87 Difference]: Start difference. First operand 79 states and 133 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 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) [2022-03-15 15:55:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:23,173 INFO L93 Difference]: Finished difference Result 103 states and 163 transitions. [2022-03-15 15:55:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:55:23,173 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 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 18 [2022-03-15 15:55:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:23,173 INFO L225 Difference]: With dead ends: 103 [2022-03-15 15:55:23,173 INFO L226 Difference]: Without dead ends: 93 [2022-03-15 15:55:23,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:23,174 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:23,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 131 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-15 15:55:23,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2022-03-15 15:55:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 79 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:23,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 134 transitions. [2022-03-15 15:55:23,175 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 134 transitions. Word has length 18 [2022-03-15 15:55:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:23,175 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 134 transitions. [2022-03-15 15:55:23,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 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) [2022-03-15 15:55:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2022-03-15 15:55:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:23,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:23,175 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:23,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:23,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:23,392 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1522329353, now seen corresponding path program 257 times [2022-03-15 15:55:23,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:23,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585263655] [2022-03-15 15:55:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:23,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:23,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:23,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585263655] [2022-03-15 15:55:23,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585263655] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:23,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610038370] [2022-03-15 15:55:23,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:23,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:23,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:23,588 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:23,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-15 15:55:23,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:55:23,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:23,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:23,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:24,167 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 152 treesize of output 120 [2022-03-15 15:55:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:24,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:24,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:24,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 191 [2022-03-15 15:55:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:55:24,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610038370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:24,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:24,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 27 [2022-03-15 15:55:24,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133962322] [2022-03-15 15:55:24,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:24,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:24,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:24,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:24,993 INFO L87 Difference]: Start difference. First operand 80 states and 134 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 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) [2022-03-15 15:55:25,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:25,608 INFO L93 Difference]: Finished difference Result 113 states and 179 transitions. [2022-03-15 15:55:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:55:25,609 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 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 18 [2022-03-15 15:55:25,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:25,609 INFO L225 Difference]: With dead ends: 113 [2022-03-15 15:55:25,609 INFO L226 Difference]: Without dead ends: 98 [2022-03-15 15:55:25,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:55:25,609 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:25,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 186 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:25,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-15 15:55:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2022-03-15 15:55:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.6875) internal successors, (135), 80 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 135 transitions. [2022-03-15 15:55:25,610 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 135 transitions. Word has length 18 [2022-03-15 15:55:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:25,610 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 135 transitions. [2022-03-15 15:55:25,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 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) [2022-03-15 15:55:25,611 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 135 transitions. [2022-03-15 15:55:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:25,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:25,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:25,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:25,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:25,811 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:25,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:25,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1882705245, now seen corresponding path program 258 times [2022-03-15 15:55:25,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:25,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600000567] [2022-03-15 15:55:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:25,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:25,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:25,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600000567] [2022-03-15 15:55:25,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600000567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:25,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724913250] [2022-03-15 15:55:25,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:25,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:25,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:25,966 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:25,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-15 15:55:26,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:55:26,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:26,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:26,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:26,436 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 140 treesize of output 112 [2022-03-15 15:55:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:26,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:27,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:27,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 203 [2022-03-15 15:55:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:27,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724913250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:27,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:27,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:55:27,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072636144] [2022-03-15 15:55:27,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:27,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:55:27,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:27,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:55:27,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:55:27,498 INFO L87 Difference]: Start difference. First operand 81 states and 135 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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) [2022-03-15 15:55:28,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:28,163 INFO L93 Difference]: Finished difference Result 148 states and 223 transitions. [2022-03-15 15:55:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 15:55:28,163 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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 18 [2022-03-15 15:55:28,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:28,163 INFO L225 Difference]: With dead ends: 148 [2022-03-15 15:55:28,163 INFO L226 Difference]: Without dead ends: 128 [2022-03-15 15:55:28,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:55:28,163 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:28,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 277 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:55:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-15 15:55:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2022-03-15 15:55:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.6923076923076923) internal successors, (132), 78 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 132 transitions. [2022-03-15 15:55:28,165 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 132 transitions. Word has length 18 [2022-03-15 15:55:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:28,165 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 132 transitions. [2022-03-15 15:55:28,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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) [2022-03-15 15:55:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 132 transitions. [2022-03-15 15:55:28,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:28,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:28,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:28,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-03-15 15:55:28,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-03-15 15:55:28,365 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:28,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1568253671, now seen corresponding path program 259 times [2022-03-15 15:55:28,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:28,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548747111] [2022-03-15 15:55:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:28,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:28,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:28,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548747111] [2022-03-15 15:55:28,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548747111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:28,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985880805] [2022-03-15 15:55:28,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:28,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:28,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:28,556 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:28,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-15 15:55:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:28,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:28,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:29,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:29,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 141 [2022-03-15 15:55:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:29,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:30,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:30,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 176 [2022-03-15 15:55:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:30,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985880805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:30,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:30,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:55:30,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240777420] [2022-03-15 15:55:30,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:30,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:30,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:30,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:30,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:30,323 INFO L87 Difference]: Start difference. First operand 79 states and 132 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:30,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:30,581 INFO L93 Difference]: Finished difference Result 106 states and 167 transitions. [2022-03-15 15:55:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:55:30,581 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:30,581 INFO L225 Difference]: With dead ends: 106 [2022-03-15 15:55:30,581 INFO L226 Difference]: Without dead ends: 96 [2022-03-15 15:55:30,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:30,582 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:30,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 162 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:30,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-15 15:55:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2022-03-15 15:55:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.6875) internal successors, (135), 80 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 135 transitions. [2022-03-15 15:55:30,583 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 135 transitions. Word has length 18 [2022-03-15 15:55:30,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:30,583 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 135 transitions. [2022-03-15 15:55:30,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 135 transitions. [2022-03-15 15:55:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:30,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:30,583 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:30,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:30,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:30,800 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash 665853823, now seen corresponding path program 260 times [2022-03-15 15:55:30,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:30,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994087796] [2022-03-15 15:55:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:30,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:31,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:31,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994087796] [2022-03-15 15:55:31,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994087796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:31,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366665190] [2022-03-15 15:55:31,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:31,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:31,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:31,037 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:31,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-15 15:55:31,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:31,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:31,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:31,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:31,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:55:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:31,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:32,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:32,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 177 [2022-03-15 15:55:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:32,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366665190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:32,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:32,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:55:32,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56220406] [2022-03-15 15:55:32,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:32,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:32,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:32,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:32,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:32,501 INFO L87 Difference]: Start difference. First operand 81 states and 135 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:32,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:32,697 INFO L93 Difference]: Finished difference Result 96 states and 155 transitions. [2022-03-15 15:55:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:55:32,697 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:32,697 INFO L225 Difference]: With dead ends: 96 [2022-03-15 15:55:32,697 INFO L226 Difference]: Without dead ends: 84 [2022-03-15 15:55:32,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:32,697 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:32,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 130 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:32,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-15 15:55:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-03-15 15:55:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.6835443037974684) internal successors, (133), 79 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:32,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 133 transitions. [2022-03-15 15:55:32,698 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 133 transitions. Word has length 18 [2022-03-15 15:55:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:32,698 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 133 transitions. [2022-03-15 15:55:32,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 133 transitions. [2022-03-15 15:55:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:32,699 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:32,699 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:32,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:32,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:32,916 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:32,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1203709401, now seen corresponding path program 261 times [2022-03-15 15:55:32,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:32,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247506139] [2022-03-15 15:55:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:32,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:33,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:33,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247506139] [2022-03-15 15:55:33,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247506139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:33,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197306893] [2022-03-15 15:55:33,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:33,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:33,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:33,068 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:33,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-15 15:55:33,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:55:33,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:33,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:33,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:33,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:33,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 15:55:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:33,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:34,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:34,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:55:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:34,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197306893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:34,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:34,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:55:34,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761534582] [2022-03-15 15:55:34,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:34,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:55:34,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:34,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:55:34,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:34,274 INFO L87 Difference]: Start difference. First operand 80 states and 133 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:34,457 INFO L93 Difference]: Finished difference Result 93 states and 150 transitions. [2022-03-15 15:55:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:55:34,457 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:34,457 INFO L225 Difference]: With dead ends: 93 [2022-03-15 15:55:34,457 INFO L226 Difference]: Without dead ends: 76 [2022-03-15 15:55:34,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:55:34,458 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:34,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 147 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:34,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-15 15:55:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-15 15:55:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.7066666666666668) internal successors, (128), 75 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 128 transitions. [2022-03-15 15:55:34,459 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 128 transitions. Word has length 18 [2022-03-15 15:55:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:34,459 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 128 transitions. [2022-03-15 15:55:34,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 128 transitions. [2022-03-15 15:55:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:34,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:34,459 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:34,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-03-15 15:55:34,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:34,676 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash 291309909, now seen corresponding path program 262 times [2022-03-15 15:55:34,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:34,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936015461] [2022-03-15 15:55:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:34,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:34,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:34,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936015461] [2022-03-15 15:55:34,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936015461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:34,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959205017] [2022-03-15 15:55:34,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:34,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:34,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:34,843 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:34,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-15 15:55:35,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:35,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:35,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:35,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:35,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:35,451 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 120 [2022-03-15 15:55:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:35,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:36,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:36,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 193 [2022-03-15 15:55:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:36,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959205017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:36,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:36,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:55:36,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059431051] [2022-03-15 15:55:36,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:36,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:36,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:36,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:36,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:36,213 INFO L87 Difference]: Start difference. First operand 76 states and 128 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:36,372 INFO L93 Difference]: Finished difference Result 110 states and 175 transitions. [2022-03-15 15:55:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:55:36,372 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:36,372 INFO L225 Difference]: With dead ends: 110 [2022-03-15 15:55:36,372 INFO L226 Difference]: Without dead ends: 94 [2022-03-15 15:55:36,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:36,373 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:36,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 208 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 432 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-03-15 15:55:36,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-15 15:55:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2022-03-15 15:55:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.6973684210526316) internal successors, (129), 76 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 129 transitions. [2022-03-15 15:55:36,374 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 129 transitions. Word has length 18 [2022-03-15 15:55:36,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:36,374 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 129 transitions. [2022-03-15 15:55:36,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 129 transitions. [2022-03-15 15:55:36,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:36,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:36,374 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:36,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-03-15 15:55:36,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:36,591 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:36,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:36,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1990187601, now seen corresponding path program 263 times [2022-03-15 15:55:36,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:36,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835917726] [2022-03-15 15:55:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:36,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:36,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:36,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835917726] [2022-03-15 15:55:36,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835917726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:36,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646018519] [2022-03-15 15:55:36,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:36,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:36,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:36,998 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:36,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-15 15:55:37,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:55:37,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:37,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:37,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:37,548 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 144 treesize of output 116 [2022-03-15 15:55:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:37,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:38,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:38,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 247 treesize of output 205 [2022-03-15 15:55:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:38,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646018519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:38,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:38,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:55:38,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136927352] [2022-03-15 15:55:38,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:38,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:55:38,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:38,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:55:38,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:55:38,397 INFO L87 Difference]: Start difference. First operand 77 states and 129 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:38,770 INFO L93 Difference]: Finished difference Result 108 states and 171 transitions. [2022-03-15 15:55:38,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:55:38,770 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:38,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:38,770 INFO L225 Difference]: With dead ends: 108 [2022-03-15 15:55:38,770 INFO L226 Difference]: Without dead ends: 95 [2022-03-15 15:55:38,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:55:38,771 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:38,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 200 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:38,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-15 15:55:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2022-03-15 15:55:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.6973684210526316) internal successors, (129), 76 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 129 transitions. [2022-03-15 15:55:38,772 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 129 transitions. Word has length 18 [2022-03-15 15:55:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:38,772 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 129 transitions. [2022-03-15 15:55:38,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 29 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 129 transitions. [2022-03-15 15:55:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:38,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:38,772 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:38,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:38,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-03-15 15:55:38,972 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:38,973 INFO L85 PathProgramCache]: Analyzing trace with hash -310314539, now seen corresponding path program 264 times [2022-03-15 15:55:38,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:38,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783967551] [2022-03-15 15:55:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:38,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:39,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:39,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783967551] [2022-03-15 15:55:39,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783967551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:39,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114927109] [2022-03-15 15:55:39,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:39,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:39,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:39,231 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:39,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-15 15:55:39,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:55:39,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:39,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:39,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:39,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:39,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 126 [2022-03-15 15:55:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:40,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:40,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:40,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 174 [2022-03-15 15:55:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:41,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114927109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:41,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:41,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:55:41,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975402912] [2022-03-15 15:55:41,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:41,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:41,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:41,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:41,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:41,041 INFO L87 Difference]: Start difference. First operand 77 states and 129 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:41,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:41,437 INFO L93 Difference]: Finished difference Result 136 states and 203 transitions. [2022-03-15 15:55:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:55:41,437 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:41,438 INFO L225 Difference]: With dead ends: 136 [2022-03-15 15:55:41,438 INFO L226 Difference]: Without dead ends: 116 [2022-03-15 15:55:41,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:41,438 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:41,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 184 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 512 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-03-15 15:55:41,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-15 15:55:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 78. [2022-03-15 15:55:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.6883116883116882) internal successors, (130), 77 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 130 transitions. [2022-03-15 15:55:41,439 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 130 transitions. Word has length 18 [2022-03-15 15:55:41,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:41,439 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 130 transitions. [2022-03-15 15:55:41,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 130 transitions. [2022-03-15 15:55:41,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:41,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:41,439 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:41,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-03-15 15:55:41,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-03-15 15:55:41,656 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash 533693841, now seen corresponding path program 265 times [2022-03-15 15:55:41,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:41,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751809973] [2022-03-15 15:55:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:41,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:41,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:41,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751809973] [2022-03-15 15:55:41,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751809973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:41,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577813637] [2022-03-15 15:55:41,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:41,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:41,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:41,808 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:41,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-15 15:55:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:42,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:42,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:42,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:42,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 128 [2022-03-15 15:55:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:42,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:43,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:43,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 175 [2022-03-15 15:55:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:43,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577813637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:43,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:43,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:55:43,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40992602] [2022-03-15 15:55:43,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:43,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:55:43,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:55:43,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:55:43,258 INFO L87 Difference]: Start difference. First operand 78 states and 130 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:43,679 INFO L93 Difference]: Finished difference Result 112 states and 171 transitions. [2022-03-15 15:55:43,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:55:43,680 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:43,680 INFO L225 Difference]: With dead ends: 112 [2022-03-15 15:55:43,680 INFO L226 Difference]: Without dead ends: 89 [2022-03-15 15:55:43,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:55:43,680 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:43,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 142 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 429 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-03-15 15:55:43,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-15 15:55:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2022-03-15 15:55:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.68) internal successors, (126), 75 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 126 transitions. [2022-03-15 15:55:43,682 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 126 transitions. Word has length 18 [2022-03-15 15:55:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:43,682 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 126 transitions. [2022-03-15 15:55:43,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 126 transitions. [2022-03-15 15:55:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:43,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:43,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:43,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-03-15 15:55:43,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-03-15 15:55:43,899 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash 575706257, now seen corresponding path program 266 times [2022-03-15 15:55:43,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:43,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54784364] [2022-03-15 15:55:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:43,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:44,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:44,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54784364] [2022-03-15 15:55:44,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54784364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:44,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669920261] [2022-03-15 15:55:44,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:44,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:44,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:44,089 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:44,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-15 15:55:44,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:44,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:44,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:44,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:44,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:44,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 136 [2022-03-15 15:55:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:44,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:45,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:45,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 202 [2022-03-15 15:55:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:45,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669920261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:45,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:45,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2022-03-15 15:55:45,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693049119] [2022-03-15 15:55:45,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:45,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:45,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:45,468 INFO L87 Difference]: Start difference. First operand 76 states and 126 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:45,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:45,841 INFO L93 Difference]: Finished difference Result 88 states and 140 transitions. [2022-03-15 15:55:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:55:45,841 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:45,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:45,841 INFO L225 Difference]: With dead ends: 88 [2022-03-15 15:55:45,841 INFO L226 Difference]: Without dead ends: 73 [2022-03-15 15:55:45,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:55:45,841 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:45,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 96 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-15 15:55:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-15 15:55:45,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 72 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 121 transitions. [2022-03-15 15:55:45,842 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 121 transitions. Word has length 18 [2022-03-15 15:55:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:45,842 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 121 transitions. [2022-03-15 15:55:45,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:45,843 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 121 transitions. [2022-03-15 15:55:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:45,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:45,843 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:45,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:46,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-15 15:55:46,043 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:46,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1878091153, now seen corresponding path program 267 times [2022-03-15 15:55:46,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:46,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225066063] [2022-03-15 15:55:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:46,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:46,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:46,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225066063] [2022-03-15 15:55:46,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225066063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:46,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033185026] [2022-03-15 15:55:46,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:46,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:46,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:46,196 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:46,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-15 15:55:46,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:55:46,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:46,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:46,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:46,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:46,749 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 116 [2022-03-15 15:55:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:46,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:47,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:47,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 176 [2022-03-15 15:55:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:48,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033185026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:48,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:48,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-03-15 15:55:48,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272206059] [2022-03-15 15:55:48,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:48,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:55:48,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:48,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:55:48,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:48,017 INFO L87 Difference]: Start difference. First operand 73 states and 121 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:48,832 INFO L93 Difference]: Finished difference Result 188 states and 297 transitions. [2022-03-15 15:55:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:55:48,832 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:48,832 INFO L225 Difference]: With dead ends: 188 [2022-03-15 15:55:48,832 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 15:55:48,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=422, Invalid=2128, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 15:55:48,832 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 102 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:48,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 226 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 459 Invalid, 0 Unknown, 301 Unchecked, 0.2s Time] [2022-03-15 15:55:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 15:55:48,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 78. [2022-03-15 15:55:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 77 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 129 transitions. [2022-03-15 15:55:48,834 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 129 transitions. Word has length 18 [2022-03-15 15:55:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:48,834 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 129 transitions. [2022-03-15 15:55:48,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:48,834 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 129 transitions. [2022-03-15 15:55:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:48,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:48,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:48,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:49,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:49,038 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:49,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:49,039 INFO L85 PathProgramCache]: Analyzing trace with hash -182768649, now seen corresponding path program 268 times [2022-03-15 15:55:49,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:49,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636056235] [2022-03-15 15:55:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:49,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:49,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:49,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636056235] [2022-03-15 15:55:49,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636056235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:49,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992662112] [2022-03-15 15:55:49,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:55:49,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:49,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:49,344 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:49,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-15 15:55:49,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:55:49,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:49,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:49,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:49,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:49,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:55:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:50,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:50,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:50,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:55:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:50,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992662112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:50,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:50,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2022-03-15 15:55:50,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99937984] [2022-03-15 15:55:50,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:50,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:50,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:50,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:50,681 INFO L87 Difference]: Start difference. First operand 78 states and 129 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:50,932 INFO L93 Difference]: Finished difference Result 93 states and 149 transitions. [2022-03-15 15:55:50,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:55:50,932 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:50,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:50,932 INFO L225 Difference]: With dead ends: 93 [2022-03-15 15:55:50,932 INFO L226 Difference]: Without dead ends: 81 [2022-03-15 15:55:50,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:55:50,933 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:50,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 126 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:55:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-15 15:55:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2022-03-15 15:55:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 76 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 127 transitions. [2022-03-15 15:55:50,934 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 127 transitions. Word has length 18 [2022-03-15 15:55:50,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:50,934 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 127 transitions. [2022-03-15 15:55:50,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 127 transitions. [2022-03-15 15:55:50,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:50,934 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:50,934 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:50,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:51,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-03-15 15:55:51,148 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash 355086929, now seen corresponding path program 269 times [2022-03-15 15:55:51,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:51,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855544266] [2022-03-15 15:55:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:51,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:51,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:51,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855544266] [2022-03-15 15:55:51,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855544266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:51,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471857775] [2022-03-15 15:55:51,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:55:51,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:51,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:51,289 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:51,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-15 15:55:51,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:55:51,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:51,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:51,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:51,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:51,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 15:55:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:52,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:52,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:52,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:55:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:52,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471857775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:52,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:52,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2022-03-15 15:55:52,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138088717] [2022-03-15 15:55:52,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:52,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:52,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:52,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:52,822 INFO L87 Difference]: Start difference. First operand 77 states and 127 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:53,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:53,112 INFO L93 Difference]: Finished difference Result 90 states and 144 transitions. [2022-03-15 15:55:53,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:55:53,112 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:53,112 INFO L225 Difference]: With dead ends: 90 [2022-03-15 15:55:53,112 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 15:55:53,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:55:53,112 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:53,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 144 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:55:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 15:55:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-15 15:55:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 73 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 123 transitions. [2022-03-15 15:55:53,113 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 123 transitions. Word has length 18 [2022-03-15 15:55:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:53,113 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 123 transitions. [2022-03-15 15:55:53,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 123 transitions. [2022-03-15 15:55:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:53,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:53,114 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:53,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:53,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-03-15 15:55:53,314 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:53,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1602629593, now seen corresponding path program 270 times [2022-03-15 15:55:53,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:53,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642522205] [2022-03-15 15:55:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:53,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:53,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:53,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642522205] [2022-03-15 15:55:53,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642522205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:53,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937246461] [2022-03-15 15:55:53,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:55:53,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:53,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:53,453 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:53,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-15 15:55:53,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:55:53,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:53,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:53,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:54,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:54,177 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 130 [2022-03-15 15:55:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:54,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:55,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:55,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 191 [2022-03-15 15:55:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:55,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937246461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:55,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:55,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:55:55,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489502863] [2022-03-15 15:55:55,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:55,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:55,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:55,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:55,195 INFO L87 Difference]: Start difference. First operand 74 states and 123 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:55,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:55,359 INFO L93 Difference]: Finished difference Result 107 states and 169 transitions. [2022-03-15 15:55:55,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:55:55,360 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:55,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:55,360 INFO L225 Difference]: With dead ends: 107 [2022-03-15 15:55:55,360 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 15:55:55,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:55,360 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:55,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 169 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 321 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-03-15 15:55:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 15:55:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2022-03-15 15:55:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 76 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 127 transitions. [2022-03-15 15:55:55,361 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 127 transitions. Word has length 18 [2022-03-15 15:55:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:55,361 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 127 transitions. [2022-03-15 15:55:55,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 127 transitions. [2022-03-15 15:55:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:55,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:55,362 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:55,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:55,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:55,562 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:55,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1635649759, now seen corresponding path program 271 times [2022-03-15 15:55:55,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:55,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365672055] [2022-03-15 15:55:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:55,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:55,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:55,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365672055] [2022-03-15 15:55:55,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365672055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:55,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615639666] [2022-03-15 15:55:55,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:55:55,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:55,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:55,734 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:55,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-15 15:55:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:55,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:55,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:56,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:56,358 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 15:55:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:56,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:56,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:56,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 175 [2022-03-15 15:55:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:57,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615639666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:57,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:57,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:55:57,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478531131] [2022-03-15 15:55:57,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:57,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:55:57,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:57,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:55:57,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:55:57,070 INFO L87 Difference]: Start difference. First operand 77 states and 127 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:57,235 INFO L93 Difference]: Finished difference Result 102 states and 158 transitions. [2022-03-15 15:55:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:55:57,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:57,235 INFO L225 Difference]: With dead ends: 102 [2022-03-15 15:55:57,235 INFO L226 Difference]: Without dead ends: 95 [2022-03-15 15:55:57,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:57,236 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:57,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 157 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 388 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-03-15 15:55:57,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-15 15:55:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 74. [2022-03-15 15:55:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 73 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 123 transitions. [2022-03-15 15:55:57,237 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 123 transitions. Word has length 18 [2022-03-15 15:55:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:57,237 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 123 transitions. [2022-03-15 15:55:57,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 123 transitions. [2022-03-15 15:55:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:57,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:57,237 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:57,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:57,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:57,451 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:57,451 INFO L85 PathProgramCache]: Analyzing trace with hash -697872547, now seen corresponding path program 272 times [2022-03-15 15:55:57,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:57,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491495291] [2022-03-15 15:55:57,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:57,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:57,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:57,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491495291] [2022-03-15 15:55:57,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491495291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:57,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848706355] [2022-03-15 15:55:57,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:55:57,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:57,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:57,727 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:57,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-15 15:55:57,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:55:57,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:55:57,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:55:57,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:55:58,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:55:58,225 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 128 [2022-03-15 15:55:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:58,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:55:59,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:55:59,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 202 [2022-03-15 15:55:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:59,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848706355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:55:59,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:55:59,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2022-03-15 15:55:59,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665102260] [2022-03-15 15:55:59,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:55:59,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:55:59,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:55:59,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:55:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:55:59,368 INFO L87 Difference]: Start difference. First operand 74 states and 123 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:55:59,592 INFO L93 Difference]: Finished difference Result 117 states and 179 transitions. [2022-03-15 15:55:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:55:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:55:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:55:59,592 INFO L225 Difference]: With dead ends: 117 [2022-03-15 15:55:59,592 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 15:55:59,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:55:59,592 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:55:59,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 153 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 381 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2022-03-15 15:55:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 15:55:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2022-03-15 15:55:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.6756756756756757) internal successors, (124), 74 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 124 transitions. [2022-03-15 15:55:59,593 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 124 transitions. Word has length 18 [2022-03-15 15:55:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:55:59,593 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 124 transitions. [2022-03-15 15:55:59,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:55:59,594 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 124 transitions. [2022-03-15 15:55:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:55:59,594 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:55:59,594 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:55:59,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-03-15 15:55:59,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2022-03-15 15:55:59,807 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:55:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:55:59,807 INFO L85 PathProgramCache]: Analyzing trace with hash 146135833, now seen corresponding path program 273 times [2022-03-15 15:55:59,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:55:59,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651455454] [2022-03-15 15:55:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:55:59,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:55:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:55:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:55:59,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:55:59,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651455454] [2022-03-15 15:55:59,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651455454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:55:59,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904332698] [2022-03-15 15:55:59,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:55:59,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:55:59,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:55:59,979 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:55:59,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-15 15:56:00,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:56:00,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:00,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:56:00,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:00,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:00,398 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 112 [2022-03-15 15:56:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:00,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:01,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:01,084 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 192 treesize of output 172 [2022-03-15 15:56:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:01,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904332698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:01,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:01,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-03-15 15:56:01,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37480804] [2022-03-15 15:56:01,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:01,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:56:01,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:01,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:56:01,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:56:01,320 INFO L87 Difference]: Start difference. First operand 75 states and 124 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:01,762 INFO L93 Difference]: Finished difference Result 152 states and 233 transitions. [2022-03-15 15:56:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:56:01,762 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:01,762 INFO L225 Difference]: With dead ends: 152 [2022-03-15 15:56:01,762 INFO L226 Difference]: Without dead ends: 141 [2022-03-15 15:56:01,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:56:01,763 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:01,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 186 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 581 Invalid, 0 Unknown, 1 Unchecked, 0.2s Time] [2022-03-15 15:56:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-15 15:56:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 74. [2022-03-15 15:56:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.6712328767123288) internal successors, (122), 73 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 122 transitions. [2022-03-15 15:56:01,764 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 122 transitions. Word has length 18 [2022-03-15 15:56:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:01,764 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 122 transitions. [2022-03-15 15:56:01,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 122 transitions. [2022-03-15 15:56:01,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:01,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:01,764 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:01,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:01,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:01,981 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:01,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2000034927, now seen corresponding path program 274 times [2022-03-15 15:56:01,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:01,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254089345] [2022-03-15 15:56:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:01,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:02,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:02,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254089345] [2022-03-15 15:56:02,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254089345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:02,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806035989] [2022-03-15 15:56:02,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:02,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:02,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:02,117 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:02,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-15 15:56:02,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:02,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:02,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:02,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:02,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:02,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 128 [2022-03-15 15:56:02,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:02,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:03,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:03,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 176 [2022-03-15 15:56:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:03,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806035989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:03,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:03,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-03-15 15:56:03,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630689921] [2022-03-15 15:56:03,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:03,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:03,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:03,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:03,281 INFO L87 Difference]: Start difference. First operand 74 states and 122 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:03,544 INFO L93 Difference]: Finished difference Result 116 states and 176 transitions. [2022-03-15 15:56:03,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:56:03,544 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:03,544 INFO L225 Difference]: With dead ends: 116 [2022-03-15 15:56:03,545 INFO L226 Difference]: Without dead ends: 106 [2022-03-15 15:56:03,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:03,545 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:03,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 135 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:56:03,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-15 15:56:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2022-03-15 15:56:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.662162162162162) internal successors, (123), 74 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 123 transitions. [2022-03-15 15:56:03,546 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 123 transitions. Word has length 18 [2022-03-15 15:56:03,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:03,546 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 123 transitions. [2022-03-15 15:56:03,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 123 transitions. [2022-03-15 15:56:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:03,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:03,546 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:03,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:03,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:03,760 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash 234072567, now seen corresponding path program 275 times [2022-03-15 15:56:03,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:03,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383858273] [2022-03-15 15:56:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:03,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:04,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:04,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383858273] [2022-03-15 15:56:04,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383858273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:04,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853274842] [2022-03-15 15:56:04,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:04,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:04,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:04,011 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:04,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-15 15:56:04,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:56:04,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:04,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 15:56:04,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:04,653 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 176 treesize of output 138 [2022-03-15 15:56:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:04,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:05,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:05,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 204 [2022-03-15 15:56:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:05,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853274842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:05,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:05,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 29 [2022-03-15 15:56:05,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424160472] [2022-03-15 15:56:05,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:05,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:56:05,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:05,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:56:05,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:56:05,423 INFO L87 Difference]: Start difference. First operand 75 states and 123 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:05,789 INFO L93 Difference]: Finished difference Result 104 states and 161 transitions. [2022-03-15 15:56:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:56:05,790 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:05,790 INFO L225 Difference]: With dead ends: 104 [2022-03-15 15:56:05,790 INFO L226 Difference]: Without dead ends: 91 [2022-03-15 15:56:05,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:56:05,790 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:05,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 213 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-15 15:56:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2022-03-15 15:56:05,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 72 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 120 transitions. [2022-03-15 15:56:05,791 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 120 transitions. Word has length 18 [2022-03-15 15:56:05,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:05,791 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 120 transitions. [2022-03-15 15:56:05,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 120 transitions. [2022-03-15 15:56:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:05,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:05,792 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:05,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:06,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-03-15 15:56:06,009 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:06,009 INFO L85 PathProgramCache]: Analyzing trace with hash -655860131, now seen corresponding path program 276 times [2022-03-15 15:56:06,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:06,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157706442] [2022-03-15 15:56:06,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:06,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:06,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:06,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157706442] [2022-03-15 15:56:06,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157706442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:06,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573895690] [2022-03-15 15:56:06,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:06,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:06,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:06,140 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:06,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-15 15:56:06,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:06,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:06,498 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 160 treesize of output 126 [2022-03-15 15:56:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:06,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:07,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:07,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 174 [2022-03-15 15:56:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:07,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573895690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:07,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:07,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-03-15 15:56:07,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142452568] [2022-03-15 15:56:07,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:07,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:56:07,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:07,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:56:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:56:07,611 INFO L87 Difference]: Start difference. First operand 73 states and 120 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:08,023 INFO L93 Difference]: Finished difference Result 98 states and 152 transitions. [2022-03-15 15:56:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:56:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:08,023 INFO L225 Difference]: With dead ends: 98 [2022-03-15 15:56:08,023 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 15:56:08,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:56:08,023 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:08,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 172 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:56:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 15:56:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2022-03-15 15:56:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.6619718309859155) internal successors, (118), 71 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 118 transitions. [2022-03-15 15:56:08,024 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 118 transitions. Word has length 18 [2022-03-15 15:56:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:08,024 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 118 transitions. [2022-03-15 15:56:08,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 118 transitions. [2022-03-15 15:56:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:08,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:08,025 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:08,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:08,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-03-15 15:56:08,241 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:08,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:08,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1872711553, now seen corresponding path program 277 times [2022-03-15 15:56:08,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:08,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240652447] [2022-03-15 15:56:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:08,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:08,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:08,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240652447] [2022-03-15 15:56:08,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240652447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:08,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730676137] [2022-03-15 15:56:08,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:08,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:08,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:08,517 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:08,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-15 15:56:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:08,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:08,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:09,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:09,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 15:56:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:09,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:10,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:10,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 247 treesize of output 205 [2022-03-15 15:56:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:10,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730676137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:10,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:10,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2022-03-15 15:56:10,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677049612] [2022-03-15 15:56:10,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:10,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:10,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:10,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:10,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:10,226 INFO L87 Difference]: Start difference. First operand 72 states and 118 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:10,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:10,685 INFO L93 Difference]: Finished difference Result 98 states and 151 transitions. [2022-03-15 15:56:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:56:10,685 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:10,685 INFO L225 Difference]: With dead ends: 98 [2022-03-15 15:56:10,685 INFO L226 Difference]: Without dead ends: 86 [2022-03-15 15:56:10,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:56:10,686 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 35 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:10,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 147 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-15 15:56:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2022-03-15 15:56:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.6571428571428573) internal successors, (116), 70 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 116 transitions. [2022-03-15 15:56:10,687 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 116 transitions. Word has length 18 [2022-03-15 15:56:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:10,687 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 116 transitions. [2022-03-15 15:56:10,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 116 transitions. [2022-03-15 15:56:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:10,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:10,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:10,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:10,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:10,887 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1334855975, now seen corresponding path program 278 times [2022-03-15 15:56:10,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:10,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440889267] [2022-03-15 15:56:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:10,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:11,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:11,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440889267] [2022-03-15 15:56:11,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440889267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:11,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655977273] [2022-03-15 15:56:11,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:11,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:11,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:11,080 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:11,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-15 15:56:11,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:11,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:11,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:11,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:11,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:11,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:56:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:11,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:12,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:12,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 193 [2022-03-15 15:56:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:12,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655977273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:12,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:12,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2022-03-15 15:56:12,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195661224] [2022-03-15 15:56:12,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:12,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:12,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:12,555 INFO L87 Difference]: Start difference. First operand 71 states and 116 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:12,847 INFO L93 Difference]: Finished difference Result 84 states and 133 transitions. [2022-03-15 15:56:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:56:12,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:12,848 INFO L225 Difference]: With dead ends: 84 [2022-03-15 15:56:12,848 INFO L226 Difference]: Without dead ends: 69 [2022-03-15 15:56:12,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:56:12,848 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:12,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 126 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:56:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-15 15:56:12,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-15 15:56:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 113 transitions. [2022-03-15 15:56:12,849 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 113 transitions. Word has length 18 [2022-03-15 15:56:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:12,849 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 113 transitions. [2022-03-15 15:56:12,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 113 transitions. [2022-03-15 15:56:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:12,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:12,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:12,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-03-15 15:56:13,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2022-03-15 15:56:13,066 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1541658411, now seen corresponding path program 279 times [2022-03-15 15:56:13,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:13,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266049732] [2022-03-15 15:56:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:13,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:13,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:13,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266049732] [2022-03-15 15:56:13,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266049732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:13,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410064340] [2022-03-15 15:56:13,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:13,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:13,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:13,304 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:13,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-15 15:56:13,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:56:13,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:13,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:56:13,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:13,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:13,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 134 [2022-03-15 15:56:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:14,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:14,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:14,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 201 [2022-03-15 15:56:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:15,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410064340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:15,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:15,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-03-15 15:56:15,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309548024] [2022-03-15 15:56:15,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:15,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:56:15,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:15,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:56:15,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:56:15,142 INFO L87 Difference]: Start difference. First operand 69 states and 113 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:15,894 INFO L93 Difference]: Finished difference Result 115 states and 183 transitions. [2022-03-15 15:56:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:56:15,895 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:15,895 INFO L225 Difference]: With dead ends: 115 [2022-03-15 15:56:15,895 INFO L226 Difference]: Without dead ends: 105 [2022-03-15 15:56:15,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:56:15,895 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:15,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 178 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 445 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-03-15 15:56:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-15 15:56:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 70. [2022-03-15 15:56:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 69 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 115 transitions. [2022-03-15 15:56:15,896 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 115 transitions. Word has length 18 [2022-03-15 15:56:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:15,896 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 115 transitions. [2022-03-15 15:56:15,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 115 transitions. [2022-03-15 15:56:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:15,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:15,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:15,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-03-15 15:56:16,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-03-15 15:56:16,113 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:16,114 INFO L85 PathProgramCache]: Analyzing trace with hash -697650031, now seen corresponding path program 280 times [2022-03-15 15:56:16,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:16,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631039946] [2022-03-15 15:56:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:16,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:16,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:16,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631039946] [2022-03-15 15:56:16,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631039946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:16,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672886990] [2022-03-15 15:56:16,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:16,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:16,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:16,320 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:16,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-15 15:56:16,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:16,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:16,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:16,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:16,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 125 [2022-03-15 15:56:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:16,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:17,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:17,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:56:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:17,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672886990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:17,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:17,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:56:17,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715113751] [2022-03-15 15:56:17,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:17,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:56:17,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:17,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:56:17,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:17,688 INFO L87 Difference]: Start difference. First operand 70 states and 115 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:18,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:18,111 INFO L93 Difference]: Finished difference Result 99 states and 153 transitions. [2022-03-15 15:56:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:56:18,111 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:18,111 INFO L225 Difference]: With dead ends: 99 [2022-03-15 15:56:18,111 INFO L226 Difference]: Without dead ends: 89 [2022-03-15 15:56:18,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:56:18,111 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:18,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 173 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-15 15:56:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2022-03-15 15:56:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.6619718309859155) internal successors, (118), 71 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 118 transitions. [2022-03-15 15:56:18,112 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 118 transitions. Word has length 18 [2022-03-15 15:56:18,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:18,113 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 118 transitions. [2022-03-15 15:56:18,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 118 transitions. [2022-03-15 15:56:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:18,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:18,113 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:18,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-03-15 15:56:18,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:18,313 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:18,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1536457463, now seen corresponding path program 281 times [2022-03-15 15:56:18,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:18,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820305611] [2022-03-15 15:56:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:18,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:18,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:18,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820305611] [2022-03-15 15:56:18,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820305611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:18,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137068685] [2022-03-15 15:56:18,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:18,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:18,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:18,512 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:18,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-15 15:56:18,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:56:18,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:18,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:19,009 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 142 treesize of output 114 [2022-03-15 15:56:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:19,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:19,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:19,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:56:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:19,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137068685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:19,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:19,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 15:56:19,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022030995] [2022-03-15 15:56:19,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:19,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:56:19,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:19,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:56:19,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:56:19,851 INFO L87 Difference]: Start difference. First operand 72 states and 118 transitions. Second operand has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:20,219 INFO L93 Difference]: Finished difference Result 89 states and 141 transitions. [2022-03-15 15:56:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:56:20,219 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:20,219 INFO L225 Difference]: With dead ends: 89 [2022-03-15 15:56:20,219 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:56:20,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:56:20,219 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:20,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 185 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:20,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:56:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2022-03-15 15:56:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.6571428571428573) internal successors, (116), 70 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 116 transitions. [2022-03-15 15:56:20,220 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 116 transitions. Word has length 18 [2022-03-15 15:56:20,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:20,220 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 116 transitions. [2022-03-15 15:56:20,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 116 transitions. [2022-03-15 15:56:20,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:20,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:20,221 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:20,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:20,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:20,438 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:20,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2074313041, now seen corresponding path program 282 times [2022-03-15 15:56:20,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:20,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870107432] [2022-03-15 15:56:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:20,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:20,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:20,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870107432] [2022-03-15 15:56:20,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870107432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:20,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523324915] [2022-03-15 15:56:20,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:20,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:20,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:20,642 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:20,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-15 15:56:20,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:56:20,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:20,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:21,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:21,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 15:56:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:21,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:21,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:21,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 193 [2022-03-15 15:56:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:22,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523324915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:22,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:22,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:56:22,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309842864] [2022-03-15 15:56:22,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:22,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:56:22,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:22,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:56:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:22,099 INFO L87 Difference]: Start difference. First operand 71 states and 116 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:56:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:22,348 INFO L93 Difference]: Finished difference Result 88 states and 139 transitions. [2022-03-15 15:56:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:56:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:56:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:22,349 INFO L225 Difference]: With dead ends: 88 [2022-03-15 15:56:22,349 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 15:56:22,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:56:22,349 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:22,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 173 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:56:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 15:56:22,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2022-03-15 15:56:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.6521739130434783) internal successors, (114), 69 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 114 transitions. [2022-03-15 15:56:22,350 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 114 transitions. Word has length 18 [2022-03-15 15:56:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:22,350 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 114 transitions. [2022-03-15 15:56:22,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:56:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 114 transitions. [2022-03-15 15:56:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:22,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:22,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:22,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:22,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable295 [2022-03-15 15:56:22,561 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:22,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:22,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1567966775, now seen corresponding path program 283 times [2022-03-15 15:56:22,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:22,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938107955] [2022-03-15 15:56:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:22,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:22,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:22,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938107955] [2022-03-15 15:56:22,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938107955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:22,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761487480] [2022-03-15 15:56:22,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:22,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:22,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:22,814 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:22,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-15 15:56:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:22,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:23,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:23,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:56:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:23,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:24,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:24,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:56:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:24,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761487480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:24,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:24,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:56:24,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082136015] [2022-03-15 15:56:24,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:24,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:56:24,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:24,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:56:24,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:24,198 INFO L87 Difference]: Start difference. First operand 70 states and 114 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:56:24,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:24,373 INFO L93 Difference]: Finished difference Result 85 states and 134 transitions. [2022-03-15 15:56:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:56:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:56:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:24,373 INFO L225 Difference]: With dead ends: 85 [2022-03-15 15:56:24,373 INFO L226 Difference]: Without dead ends: 64 [2022-03-15 15:56:24,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:56:24,374 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:24,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 128 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:56:24,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-15 15:56:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-15 15:56:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 63 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 106 transitions. [2022-03-15 15:56:24,375 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 106 transitions. Word has length 18 [2022-03-15 15:56:24,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:24,375 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 106 transitions. [2022-03-15 15:56:24,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:56:24,375 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 106 transitions. [2022-03-15 15:56:24,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:24,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:24,376 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:24,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:24,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:24,579 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2135109447, now seen corresponding path program 284 times [2022-03-15 15:56:24,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:24,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956660650] [2022-03-15 15:56:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:24,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:24,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956660650] [2022-03-15 15:56:24,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956660650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:24,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345199503] [2022-03-15 15:56:24,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:24,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:24,894 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:24,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-15 15:56:25,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:25,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:25,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:25,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:25,476 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 145 treesize of output 117 [2022-03-15 15:56:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:25,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:26,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:26,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 177 [2022-03-15 15:56:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:26,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345199503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:26,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:26,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:56:26,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854549989] [2022-03-15 15:56:26,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:26,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:26,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:26,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:26,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:26,463 INFO L87 Difference]: Start difference. First operand 64 states and 106 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:26,739 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2022-03-15 15:56:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:56:26,740 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:26,740 INFO L225 Difference]: With dead ends: 105 [2022-03-15 15:56:26,740 INFO L226 Difference]: Without dead ends: 86 [2022-03-15 15:56:26,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:26,740 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:26,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 271 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-15 15:56:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-03-15 15:56:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 60 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 100 transitions. [2022-03-15 15:56:26,741 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 100 transitions. Word has length 18 [2022-03-15 15:56:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:26,741 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 100 transitions. [2022-03-15 15:56:26,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 100 transitions. [2022-03-15 15:56:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:26,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:26,741 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:26,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:26,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:26,948 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1034256949, now seen corresponding path program 285 times [2022-03-15 15:56:26,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:26,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623566454] [2022-03-15 15:56:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:26,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:27,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:27,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623566454] [2022-03-15 15:56:27,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623566454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:27,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906728174] [2022-03-15 15:56:27,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:27,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:27,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:27,265 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:27,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-15 15:56:27,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:56:27,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:27,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:27,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:27,749 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 143 treesize of output 115 [2022-03-15 15:56:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:27,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:28,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:28,518 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 252 treesize of output 206 [2022-03-15 15:56:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:28,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906728174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:28,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:28,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:56:28,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051714132] [2022-03-15 15:56:28,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:28,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:56:28,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:56:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:56:28,737 INFO L87 Difference]: Start difference. First operand 61 states and 100 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:29,310 INFO L93 Difference]: Finished difference Result 116 states and 181 transitions. [2022-03-15 15:56:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:56:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:29,310 INFO L225 Difference]: With dead ends: 116 [2022-03-15 15:56:29,310 INFO L226 Difference]: Without dead ends: 84 [2022-03-15 15:56:29,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:56:29,311 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:29,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 220 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:29,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-15 15:56:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2022-03-15 15:56:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:29,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 103 transitions. [2022-03-15 15:56:29,312 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 103 transitions. Word has length 18 [2022-03-15 15:56:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:29,312 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 103 transitions. [2022-03-15 15:56:29,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 103 transitions. [2022-03-15 15:56:29,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:29,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:29,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:29,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:29,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-03-15 15:56:29,512 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash 664620743, now seen corresponding path program 286 times [2022-03-15 15:56:29,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:29,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825524335] [2022-03-15 15:56:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:29,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:29,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825524335] [2022-03-15 15:56:29,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825524335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:29,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982722956] [2022-03-15 15:56:29,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:29,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:29,686 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:29,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-15 15:56:29,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:29,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:29,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:29,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:30,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:30,549 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 15:56:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:30,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:31,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:31,507 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 252 treesize of output 206 [2022-03-15 15:56:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:31,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982722956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:31,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:31,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:56:31,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161362242] [2022-03-15 15:56:31,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:31,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:56:31,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:56:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:56:31,653 INFO L87 Difference]: Start difference. First operand 63 states and 103 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:32,026 INFO L93 Difference]: Finished difference Result 108 states and 166 transitions. [2022-03-15 15:56:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:56:32,026 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:32,027 INFO L225 Difference]: With dead ends: 108 [2022-03-15 15:56:32,027 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 15:56:32,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:56:32,027 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:32,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 187 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 392 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2022-03-15 15:56:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 15:56:32,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2022-03-15 15:56:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 103 transitions. [2022-03-15 15:56:32,028 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 103 transitions. Word has length 18 [2022-03-15 15:56:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:32,028 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 103 transitions. [2022-03-15 15:56:32,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:32,028 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 103 transitions. [2022-03-15 15:56:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:32,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:32,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:32,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-03-15 15:56:32,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-03-15 15:56:32,245 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:32,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1635881397, now seen corresponding path program 287 times [2022-03-15 15:56:32,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:32,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800812097] [2022-03-15 15:56:32,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:32,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:32,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:32,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800812097] [2022-03-15 15:56:32,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800812097] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:32,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36765091] [2022-03-15 15:56:32,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:32,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:32,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:32,511 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:32,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-15 15:56:32,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:56:32,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:33,022 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 183 treesize of output 143 [2022-03-15 15:56:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:33,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:33,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:33,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:56:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:34,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36765091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:34,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:34,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 15:56:34,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067874840] [2022-03-15 15:56:34,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:34,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:56:34,106 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:56:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:56:34,106 INFO L87 Difference]: Start difference. First operand 63 states and 103 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:34,636 INFO L93 Difference]: Finished difference Result 127 states and 185 transitions. [2022-03-15 15:56:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:56:34,636 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:34,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:34,636 INFO L225 Difference]: With dead ends: 127 [2022-03-15 15:56:34,637 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 15:56:34,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=1521, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:56:34,637 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:34,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 296 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:34,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 15:56:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2022-03-15 15:56:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.646153846153846) internal successors, (107), 65 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 107 transitions. [2022-03-15 15:56:34,638 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 107 transitions. Word has length 18 [2022-03-15 15:56:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:34,638 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 107 transitions. [2022-03-15 15:56:34,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 107 transitions. [2022-03-15 15:56:34,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:34,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:34,639 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:34,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:34,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-03-15 15:56:34,856 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:34,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:34,856 INFO L85 PathProgramCache]: Analyzing trace with hash -791873017, now seen corresponding path program 288 times [2022-03-15 15:56:34,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:34,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649879215] [2022-03-15 15:56:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:34,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:35,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:35,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649879215] [2022-03-15 15:56:35,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649879215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:35,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321402378] [2022-03-15 15:56:35,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:35,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:35,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:35,121 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:35,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-15 15:56:35,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:56:35,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:35,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:35,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:35,673 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 149 treesize of output 119 [2022-03-15 15:56:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:35,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:37,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:37,004 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 200 treesize of output 174 [2022-03-15 15:56:37,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:37,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321402378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:37,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:37,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:56:37,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092110544] [2022-03-15 15:56:37,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:37,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:56:37,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:37,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:56:37,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:56:37,264 INFO L87 Difference]: Start difference. First operand 66 states and 107 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:56:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:37,998 INFO L93 Difference]: Finished difference Result 99 states and 151 transitions. [2022-03-15 15:56:37,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:56:37,999 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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 18 [2022-03-15 15:56:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:37,999 INFO L225 Difference]: With dead ends: 99 [2022-03-15 15:56:37,999 INFO L226 Difference]: Without dead ends: 86 [2022-03-15 15:56:37,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:56:37,999 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:37,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 85 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-15 15:56:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2022-03-15 15:56:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2022-03-15 15:56:38,000 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 18 [2022-03-15 15:56:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:38,000 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2022-03-15 15:56:38,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:56:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2022-03-15 15:56:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:38,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:38,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:38,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:38,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:38,201 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:38,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1773287619, now seen corresponding path program 289 times [2022-03-15 15:56:38,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:38,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968200874] [2022-03-15 15:56:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:38,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:38,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:38,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968200874] [2022-03-15 15:56:38,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968200874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:38,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428300023] [2022-03-15 15:56:38,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:38,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:38,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:38,468 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:38,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-15 15:56:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:38,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:39,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:39,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 126 [2022-03-15 15:56:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:39,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:40,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:40,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:56:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:40,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428300023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:40,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:40,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 23 [2022-03-15 15:56:40,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800637347] [2022-03-15 15:56:40,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:40,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:40,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:40,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:40,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:40,367 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) [2022-03-15 15:56:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:40,939 INFO L93 Difference]: Finished difference Result 91 states and 138 transitions. [2022-03-15 15:56:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:56:40,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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 18 [2022-03-15 15:56:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:40,940 INFO L225 Difference]: With dead ends: 91 [2022-03-15 15:56:40,940 INFO L226 Difference]: Without dead ends: 81 [2022-03-15 15:56:40,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:56:40,940 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:40,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 75 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 275 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-03-15 15:56:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-15 15:56:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2022-03-15 15:56:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2022-03-15 15:56:40,941 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 18 [2022-03-15 15:56:40,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:40,941 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2022-03-15 15:56:40,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) [2022-03-15 15:56:40,941 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2022-03-15 15:56:40,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:40,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:40,941 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:40,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:41,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-03-15 15:56:41,142 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:41,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1677671297, now seen corresponding path program 290 times [2022-03-15 15:56:41,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:41,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879440271] [2022-03-15 15:56:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:41,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:41,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:41,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879440271] [2022-03-15 15:56:41,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879440271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:41,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374908518] [2022-03-15 15:56:41,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:41,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:41,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:41,284 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:41,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-15 15:56:41,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:41,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:41,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:41,808 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 146 [2022-03-15 15:56:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:42,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:42,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:42,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 182 [2022-03-15 15:56:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:56:42,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374908518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:42,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:42,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:56:42,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775147742] [2022-03-15 15:56:42,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:42,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:42,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:42,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:42,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:42,849 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:43,204 INFO L93 Difference]: Finished difference Result 91 states and 137 transitions. [2022-03-15 15:56:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:56:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:43,205 INFO L225 Difference]: With dead ends: 91 [2022-03-15 15:56:43,205 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:56:43,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:56:43,205 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:43,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 87 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 268 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-03-15 15:56:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:56:43,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2022-03-15 15:56:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 62 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 102 transitions. [2022-03-15 15:56:43,206 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 102 transitions. Word has length 18 [2022-03-15 15:56:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:43,206 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 102 transitions. [2022-03-15 15:56:43,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 102 transitions. [2022-03-15 15:56:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:43,206 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:43,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:43,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:43,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:43,413 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash 510511879, now seen corresponding path program 291 times [2022-03-15 15:56:43,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:43,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246182304] [2022-03-15 15:56:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:43,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:43,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:43,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246182304] [2022-03-15 15:56:43,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246182304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:43,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705352785] [2022-03-15 15:56:43,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:43,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:43,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:43,648 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:43,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-15 15:56:43,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:56:43,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:43,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:44,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:44,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 126 [2022-03-15 15:56:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:44,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:44,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:44,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 201 [2022-03-15 15:56:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:45,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705352785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:45,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:45,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:56:45,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428216256] [2022-03-15 15:56:45,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:45,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:56:45,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:56:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:56:45,137 INFO L87 Difference]: Start difference. First operand 63 states and 102 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 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) [2022-03-15 15:56:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:45,583 INFO L93 Difference]: Finished difference Result 119 states and 175 transitions. [2022-03-15 15:56:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:56:45,583 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 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 18 [2022-03-15 15:56:45,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:45,583 INFO L225 Difference]: With dead ends: 119 [2022-03-15 15:56:45,583 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 15:56:45,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:56:45,584 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 79 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:45,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 108 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 302 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-03-15 15:56:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 15:56:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 62. [2022-03-15 15:56:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.639344262295082) internal successors, (100), 61 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:45,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 100 transitions. [2022-03-15 15:56:45,584 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 100 transitions. Word has length 18 [2022-03-15 15:56:45,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:45,585 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 100 transitions. [2022-03-15 15:56:45,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 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) [2022-03-15 15:56:45,585 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 100 transitions. [2022-03-15 15:56:45,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:45,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:45,585 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:45,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:45,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-03-15 15:56:45,802 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1815300035, now seen corresponding path program 292 times [2022-03-15 15:56:45,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:45,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810050213] [2022-03-15 15:56:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:45,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:45,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:45,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810050213] [2022-03-15 15:56:45,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810050213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:45,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116338248] [2022-03-15 15:56:45,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:56:45,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:45,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:45,990 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:45,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-15 15:56:46,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:56:46,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:46,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:46,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:46,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:46,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 136 [2022-03-15 15:56:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:46,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:47,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:47,458 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 192 treesize of output 172 [2022-03-15 15:56:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:47,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116338248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:47,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:47,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 24 [2022-03-15 15:56:47,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996833982] [2022-03-15 15:56:47,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:47,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:56:47,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:47,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:56:47,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:56:47,650 INFO L87 Difference]: Start difference. First operand 62 states and 100 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:48,008 INFO L93 Difference]: Finished difference Result 116 states and 172 transitions. [2022-03-15 15:56:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:56:48,008 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:48,008 INFO L225 Difference]: With dead ends: 116 [2022-03-15 15:56:48,008 INFO L226 Difference]: Without dead ends: 96 [2022-03-15 15:56:48,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:48,009 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:48,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 107 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-15 15:56:48,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 62. [2022-03-15 15:56:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.639344262295082) internal successors, (100), 61 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 100 transitions. [2022-03-15 15:56:48,010 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 100 transitions. Word has length 18 [2022-03-15 15:56:48,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:48,010 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 100 transitions. [2022-03-15 15:56:48,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 100 transitions. [2022-03-15 15:56:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:48,010 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:48,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:48,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-03-15 15:56:48,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-03-15 15:56:48,210 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:48,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1635658881, now seen corresponding path program 293 times [2022-03-15 15:56:48,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:48,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457980336] [2022-03-15 15:56:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:48,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:48,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:48,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457980336] [2022-03-15 15:56:48,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457980336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:48,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181342231] [2022-03-15 15:56:48,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:56:48,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:48,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:48,437 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:48,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-15 15:56:48,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:56:48,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:48,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:48,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:48,968 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 157 treesize of output 123 [2022-03-15 15:56:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:49,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:49,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:49,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 172 [2022-03-15 15:56:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:50,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181342231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:50,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:50,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:56:50,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471578897] [2022-03-15 15:56:50,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:50,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:56:50,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:50,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:56:50,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:56:50,081 INFO L87 Difference]: Start difference. First operand 62 states and 100 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:50,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:50,379 INFO L93 Difference]: Finished difference Result 112 states and 165 transitions. [2022-03-15 15:56:50,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:56:50,380 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:50,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:50,380 INFO L225 Difference]: With dead ends: 112 [2022-03-15 15:56:50,380 INFO L226 Difference]: Without dead ends: 92 [2022-03-15 15:56:50,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:56:50,380 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 55 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:50,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 97 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:56:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-15 15:56:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2022-03-15 15:56:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.6290322580645162) internal successors, (101), 62 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 101 transitions. [2022-03-15 15:56:50,381 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 101 transitions. Word has length 18 [2022-03-15 15:56:50,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:50,381 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 101 transitions. [2022-03-15 15:56:50,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:50,381 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 101 transitions. [2022-03-15 15:56:50,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:50,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:50,381 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:50,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:50,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:50,598 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:50,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:50,598 INFO L85 PathProgramCache]: Analyzing trace with hash 598448613, now seen corresponding path program 294 times [2022-03-15 15:56:50,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:50,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519391363] [2022-03-15 15:56:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:50,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:50,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:50,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519391363] [2022-03-15 15:56:50,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519391363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:50,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295988651] [2022-03-15 15:56:50,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:56:50,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:50,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:50,783 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:50,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-15 15:56:51,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:56:51,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:51,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:51,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:51,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:51,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 116 [2022-03-15 15:56:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:51,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:52,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:52,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 207 [2022-03-15 15:56:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:52,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295988651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:52,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:52,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:56:52,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864072265] [2022-03-15 15:56:52,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:52,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:56:52,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:56:52,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:56:52,282 INFO L87 Difference]: Start difference. First operand 63 states and 101 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 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) [2022-03-15 15:56:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:53,036 INFO L93 Difference]: Finished difference Result 104 states and 154 transitions. [2022-03-15 15:56:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 15:56:53,036 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 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 18 [2022-03-15 15:56:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:53,037 INFO L225 Difference]: With dead ends: 104 [2022-03-15 15:56:53,037 INFO L226 Difference]: Without dead ends: 75 [2022-03-15 15:56:53,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 15:56:53,037 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:53,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 167 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:56:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-15 15:56:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2022-03-15 15:56:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 58 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 95 transitions. [2022-03-15 15:56:53,038 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 95 transitions. Word has length 18 [2022-03-15 15:56:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:53,038 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 95 transitions. [2022-03-15 15:56:53,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 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) [2022-03-15 15:56:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 95 transitions. [2022-03-15 15:56:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:53,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:53,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:53,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:53,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2022-03-15 15:56:53,239 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash -608735545, now seen corresponding path program 295 times [2022-03-15 15:56:53,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:53,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599595368] [2022-03-15 15:56:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:53,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:53,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:53,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599595368] [2022-03-15 15:56:53,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599595368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:53,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861438971] [2022-03-15 15:56:53,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:56:53,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:53,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:53,412 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:53,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-15 15:56:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:53,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:54,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:54,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 116 [2022-03-15 15:56:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:54,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:54,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:54,751 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 202 treesize of output 176 [2022-03-15 15:56:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:54,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861438971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:54,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:54,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2022-03-15 15:56:54,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065067491] [2022-03-15 15:56:54,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:54,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:56:54,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:54,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:56:54,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:56:54,887 INFO L87 Difference]: Start difference. First operand 59 states and 95 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:56:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:55,151 INFO L93 Difference]: Finished difference Result 92 states and 143 transitions. [2022-03-15 15:56:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:56:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 18 [2022-03-15 15:56:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:55,151 INFO L225 Difference]: With dead ends: 92 [2022-03-15 15:56:55,151 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 15:56:55,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:55,152 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:55,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 177 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 332 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-03-15 15:56:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 15:56:55,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2022-03-15 15:56:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6349206349206349) internal successors, (103), 63 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 103 transitions. [2022-03-15 15:56:55,153 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 103 transitions. Word has length 18 [2022-03-15 15:56:55,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:55,153 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 103 transitions. [2022-03-15 15:56:55,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:56:55,153 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 103 transitions. [2022-03-15 15:56:55,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:55,153 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:55,153 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:55,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-03-15 15:56:55,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:55,367 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:55,367 INFO L85 PathProgramCache]: Analyzing trace with hash 447952399, now seen corresponding path program 296 times [2022-03-15 15:56:55,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:55,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004042527] [2022-03-15 15:56:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:55,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:55,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:55,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004042527] [2022-03-15 15:56:55,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004042527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:55,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165998715] [2022-03-15 15:56:55,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:56:55,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:55,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:55,584 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:55,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-15 15:56:55,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:56:55,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:55,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:55,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:56,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:56,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:56:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:56,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:57,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:57,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 175 [2022-03-15 15:56:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:57,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165998715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:57,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:57,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-03-15 15:56:57,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741453879] [2022-03-15 15:56:57,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:57,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:56:57,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:57,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:56:57,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:56:57,301 INFO L87 Difference]: Start difference. First operand 64 states and 103 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:57,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:56:57,534 INFO L93 Difference]: Finished difference Result 87 states and 132 transitions. [2022-03-15 15:56:57,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:56:57,535 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:56:57,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:56:57,535 INFO L225 Difference]: With dead ends: 87 [2022-03-15 15:56:57,535 INFO L226 Difference]: Without dead ends: 80 [2022-03-15 15:56:57,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:56:57,535 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:56:57,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 111 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 244 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-03-15 15:56:57,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-15 15:56:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2022-03-15 15:56:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 58 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 95 transitions. [2022-03-15 15:56:57,536 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 95 transitions. Word has length 18 [2022-03-15 15:56:57,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:56:57,536 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 95 transitions. [2022-03-15 15:56:57,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:56:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 95 transitions. [2022-03-15 15:56:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:56:57,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:56:57,537 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:56:57,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-03-15 15:56:57,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:57,737 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:56:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:56:57,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1385729611, now seen corresponding path program 297 times [2022-03-15 15:56:57,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:56:57,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557548672] [2022-03-15 15:56:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:56:57,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:56:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:56:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:58,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:56:58,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557548672] [2022-03-15 15:56:58,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557548672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:56:58,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246816066] [2022-03-15 15:56:58,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:56:58,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:56:58,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:56:58,004 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:56:58,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-15 15:56:58,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:56:58,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:56:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:56:58,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:56:58,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:56:58,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 126 [2022-03-15 15:56:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:58,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:56:59,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:56:59,509 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 192 treesize of output 172 [2022-03-15 15:56:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:56:59,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246816066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:56:59,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:56:59,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-15 15:56:59,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960886833] [2022-03-15 15:56:59,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:56:59,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:56:59,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:56:59,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:56:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:56:59,727 INFO L87 Difference]: Start difference. First operand 59 states and 95 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:00,493 INFO L93 Difference]: Finished difference Result 221 states and 324 transitions. [2022-03-15 15:57:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:57:00,493 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:00,493 INFO L225 Difference]: With dead ends: 221 [2022-03-15 15:57:00,493 INFO L226 Difference]: Without dead ends: 211 [2022-03-15 15:57:00,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=345, Invalid=1817, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:57:00,494 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 224 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:00,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 233 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:57:00,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-15 15:57:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 66. [2022-03-15 15:57:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 65 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 108 transitions. [2022-03-15 15:57:00,495 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 108 transitions. Word has length 18 [2022-03-15 15:57:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:00,495 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 108 transitions. [2022-03-15 15:57:00,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 108 transitions. [2022-03-15 15:57:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:00,495 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:00,495 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:00,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:00,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:00,707 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:00,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:00,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2065229305, now seen corresponding path program 298 times [2022-03-15 15:57:00,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:00,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912281589] [2022-03-15 15:57:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:00,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:00,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:00,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912281589] [2022-03-15 15:57:00,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912281589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:00,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901457839] [2022-03-15 15:57:00,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:00,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:00,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:01,000 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:01,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-15 15:57:01,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:01,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:01,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:01,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:01,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:01,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 126 [2022-03-15 15:57:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:01,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:02,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:02,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 200 [2022-03-15 15:57:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:02,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901457839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:02,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:02,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:57:02,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211874608] [2022-03-15 15:57:02,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:02,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:57:02,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:02,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:57:02,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:57:02,308 INFO L87 Difference]: Start difference. First operand 66 states and 108 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:02,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:02,615 INFO L93 Difference]: Finished difference Result 94 states and 145 transitions. [2022-03-15 15:57:02,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:57:02,615 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:02,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:02,615 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:57:02,615 INFO L226 Difference]: Without dead ends: 83 [2022-03-15 15:57:02,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:02,615 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:02,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 108 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 306 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-03-15 15:57:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-15 15:57:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2022-03-15 15:57:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.65625) internal successors, (106), 64 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:02,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 106 transitions. [2022-03-15 15:57:02,616 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 106 transitions. Word has length 18 [2022-03-15 15:57:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:02,616 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 106 transitions. [2022-03-15 15:57:02,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 106 transitions. [2022-03-15 15:57:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:02,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:02,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:02,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:02,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-03-15 15:57:02,826 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:02,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash -760441149, now seen corresponding path program 299 times [2022-03-15 15:57:02,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:02,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784310293] [2022-03-15 15:57:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:02,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:03,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:03,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784310293] [2022-03-15 15:57:03,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784310293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:03,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579571268] [2022-03-15 15:57:03,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:03,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:03,014 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:03,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-15 15:57:03,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:03,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:03,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:03,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:03,484 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 162 treesize of output 128 [2022-03-15 15:57:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:03,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:04,298 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:04,298 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 212 treesize of output 184 [2022-03-15 15:57:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:04,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579571268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:04,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:04,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 27 [2022-03-15 15:57:04,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684643094] [2022-03-15 15:57:04,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:04,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:57:04,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:04,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:57:04,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:57:04,463 INFO L87 Difference]: Start difference. First operand 65 states and 106 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:04,909 INFO L93 Difference]: Finished difference Result 117 states and 180 transitions. [2022-03-15 15:57:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:04,909 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:04,910 INFO L225 Difference]: With dead ends: 117 [2022-03-15 15:57:04,910 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 15:57:04,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:57:04,910 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:04,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 153 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:57:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 15:57:04,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 68. [2022-03-15 15:57:04,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.671641791044776) internal successors, (112), 67 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:04,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 112 transitions. [2022-03-15 15:57:04,911 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 112 transitions. Word has length 18 [2022-03-15 15:57:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:04,911 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 112 transitions. [2022-03-15 15:57:04,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:04,911 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 112 transitions. [2022-03-15 15:57:04,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:04,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:04,911 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:04,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-03-15 15:57:05,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable312,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:05,127 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:05,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash 83567231, now seen corresponding path program 300 times [2022-03-15 15:57:05,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:05,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925540355] [2022-03-15 15:57:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:05,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:05,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:05,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925540355] [2022-03-15 15:57:05,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925540355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:05,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412029571] [2022-03-15 15:57:05,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:05,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:05,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:05,275 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:05,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-15 15:57:05,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:57:05,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:05,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:05,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:05,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:05,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 128 [2022-03-15 15:57:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:05,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:06,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:06,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 200 [2022-03-15 15:57:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:06,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412029571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:06,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:06,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:57:06,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134285480] [2022-03-15 15:57:06,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:06,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:57:06,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:06,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:57:06,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:57:06,968 INFO L87 Difference]: Start difference. First operand 68 states and 112 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:07,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:07,222 INFO L93 Difference]: Finished difference Result 92 states and 142 transitions. [2022-03-15 15:57:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:57:07,222 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:07,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:07,222 INFO L225 Difference]: With dead ends: 92 [2022-03-15 15:57:07,222 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 15:57:07,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:07,222 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:07,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 97 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:57:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 15:57:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 69. [2022-03-15 15:57:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 113 transitions. [2022-03-15 15:57:07,223 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 113 transitions. Word has length 18 [2022-03-15 15:57:07,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:07,224 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 113 transitions. [2022-03-15 15:57:07,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 113 transitions. [2022-03-15 15:57:07,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:07,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:07,224 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:07,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:07,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:07,439 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:07,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1977292571, now seen corresponding path program 301 times [2022-03-15 15:57:07,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:07,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155607065] [2022-03-15 15:57:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:07,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:07,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:07,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155607065] [2022-03-15 15:57:07,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155607065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:07,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742112736] [2022-03-15 15:57:07,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:07,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:07,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:07,569 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:07,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-15 15:57:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:07,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:07,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:08,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:08,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 120 [2022-03-15 15:57:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:08,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:08,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:08,575 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 202 treesize of output 176 [2022-03-15 15:57:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:08,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742112736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:08,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:08,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:57:08,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481657961] [2022-03-15 15:57:08,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:08,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:57:08,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:08,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:57:08,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:57:08,738 INFO L87 Difference]: Start difference. First operand 69 states and 113 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:09,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:09,101 INFO L93 Difference]: Finished difference Result 80 states and 127 transitions. [2022-03-15 15:57:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:57:09,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:09,101 INFO L225 Difference]: With dead ends: 80 [2022-03-15 15:57:09,101 INFO L226 Difference]: Without dead ends: 67 [2022-03-15 15:57:09,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:09,102 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:09,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 86 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:57:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-15 15:57:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-15 15:57:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 66 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 110 transitions. [2022-03-15 15:57:09,102 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 110 transitions. Word has length 18 [2022-03-15 15:57:09,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:09,103 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 110 transitions. [2022-03-15 15:57:09,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:09,103 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 110 transitions. [2022-03-15 15:57:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:09,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:09,103 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:09,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:09,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2022-03-15 15:57:09,303 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:09,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1427742027, now seen corresponding path program 302 times [2022-03-15 15:57:09,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:09,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920972219] [2022-03-15 15:57:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:09,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:09,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:09,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920972219] [2022-03-15 15:57:09,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920972219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:09,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719696670] [2022-03-15 15:57:09,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:09,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:09,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:09,521 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:09,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-15 15:57:09,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:09,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:09,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:09,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:10,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:10,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 143 [2022-03-15 15:57:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:10,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:10,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:10,745 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 205 treesize of output 175 [2022-03-15 15:57:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:10,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719696670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:10,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:10,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:57:10,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187265563] [2022-03-15 15:57:10,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:10,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:57:10,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:57:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:57:10,881 INFO L87 Difference]: Start difference. First operand 67 states and 110 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:11,081 INFO L93 Difference]: Finished difference Result 95 states and 148 transitions. [2022-03-15 15:57:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:57:11,081 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:11,081 INFO L225 Difference]: With dead ends: 95 [2022-03-15 15:57:11,082 INFO L226 Difference]: Without dead ends: 85 [2022-03-15 15:57:11,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:11,082 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:11,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 125 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:57:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-15 15:57:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2022-03-15 15:57:11,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 66 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 110 transitions. [2022-03-15 15:57:11,083 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 110 transitions. Word has length 18 [2022-03-15 15:57:11,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:11,083 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 110 transitions. [2022-03-15 15:57:11,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:11,083 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 110 transitions. [2022-03-15 15:57:11,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:11,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:11,083 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:11,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:11,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-03-15 15:57:11,300 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2023216889, now seen corresponding path program 303 times [2022-03-15 15:57:11,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:11,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062602856] [2022-03-15 15:57:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:11,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:11,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:11,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062602856] [2022-03-15 15:57:11,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062602856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:11,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383462900] [2022-03-15 15:57:11,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:11,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:11,467 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:11,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-15 15:57:11,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:57:11,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:11,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:57:11,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:11,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:11,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 143 [2022-03-15 15:57:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:12,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:12,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:12,769 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 238 treesize of output 204 [2022-03-15 15:57:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:13,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383462900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:13,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:13,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:57:13,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528689500] [2022-03-15 15:57:13,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:13,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:57:13,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:13,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:57:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:13,086 INFO L87 Difference]: Start difference. First operand 67 states and 110 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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) [2022-03-15 15:57:13,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:13,710 INFO L93 Difference]: Finished difference Result 122 states and 181 transitions. [2022-03-15 15:57:13,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:57:13,710 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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 18 [2022-03-15 15:57:13,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:13,710 INFO L225 Difference]: With dead ends: 122 [2022-03-15 15:57:13,710 INFO L226 Difference]: Without dead ends: 112 [2022-03-15 15:57:13,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:57:13,711 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 76 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:13,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 139 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 346 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-03-15 15:57:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-15 15:57:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 69. [2022-03-15 15:57:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 113 transitions. [2022-03-15 15:57:13,712 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 113 transitions. Word has length 18 [2022-03-15 15:57:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:13,712 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 113 transitions. [2022-03-15 15:57:13,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 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) [2022-03-15 15:57:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 113 transitions. [2022-03-15 15:57:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:13,712 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:13,712 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:13,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:13,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:13,922 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:13,922 INFO L85 PathProgramCache]: Analyzing trace with hash 210890605, now seen corresponding path program 304 times [2022-03-15 15:57:13,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:13,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548395854] [2022-03-15 15:57:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:13,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:14,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:14,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548395854] [2022-03-15 15:57:14,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548395854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:14,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546032457] [2022-03-15 15:57:14,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:14,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:14,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:14,180 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:14,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-15 15:57:14,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:14,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:14,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:14,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:14,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:14,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 138 [2022-03-15 15:57:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:14,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:15,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:15,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:57:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:15,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546032457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:15,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:15,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:57:15,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573549415] [2022-03-15 15:57:15,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:15,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:57:15,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:15,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:57:15,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:57:15,399 INFO L87 Difference]: Start difference. First operand 69 states and 113 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:15,589 INFO L93 Difference]: Finished difference Result 84 states and 133 transitions. [2022-03-15 15:57:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:57:15,589 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:15,589 INFO L225 Difference]: With dead ends: 84 [2022-03-15 15:57:15,589 INFO L226 Difference]: Without dead ends: 72 [2022-03-15 15:57:15,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:15,590 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:15,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 127 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:57:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-15 15:57:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-03-15 15:57:15,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.6567164179104477) internal successors, (111), 67 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:15,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 111 transitions. [2022-03-15 15:57:15,591 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 111 transitions. Word has length 18 [2022-03-15 15:57:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:15,591 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 111 transitions. [2022-03-15 15:57:15,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 111 transitions. [2022-03-15 15:57:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:15,591 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:15,591 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:15,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:15,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2022-03-15 15:57:15,810 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash 748746183, now seen corresponding path program 305 times [2022-03-15 15:57:15,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:15,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266195459] [2022-03-15 15:57:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:15,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:15,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:15,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266195459] [2022-03-15 15:57:15,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266195459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:15,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137357799] [2022-03-15 15:57:15,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:15,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:15,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:15,997 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:15,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-15 15:57:16,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:57:16,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:16,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:16,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:16,579 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 166 treesize of output 132 [2022-03-15 15:57:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:16,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:17,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:17,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 221 [2022-03-15 15:57:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:17,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137357799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:17,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:17,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:57:17,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177662546] [2022-03-15 15:57:17,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:17,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:57:17,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:17,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:57:17,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:17,527 INFO L87 Difference]: Start difference. First operand 68 states and 111 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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) [2022-03-15 15:57:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:17,862 INFO L93 Difference]: Finished difference Result 109 states and 169 transitions. [2022-03-15 15:57:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:57:17,862 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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 18 [2022-03-15 15:57:17,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:17,863 INFO L225 Difference]: With dead ends: 109 [2022-03-15 15:57:17,863 INFO L226 Difference]: Without dead ends: 88 [2022-03-15 15:57:17,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:57:17,863 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:17,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 208 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:57:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-15 15:57:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2022-03-15 15:57:17,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 63 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:17,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 105 transitions. [2022-03-15 15:57:17,865 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 105 transitions. Word has length 18 [2022-03-15 15:57:17,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:17,865 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 105 transitions. [2022-03-15 15:57:17,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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) [2022-03-15 15:57:17,865 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 105 transitions. [2022-03-15 15:57:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:17,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:17,865 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:17,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-03-15 15:57:18,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:18,073 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash -163653309, now seen corresponding path program 306 times [2022-03-15 15:57:18,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:18,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318269302] [2022-03-15 15:57:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:18,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:18,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:18,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318269302] [2022-03-15 15:57:18,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318269302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:18,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343000522] [2022-03-15 15:57:18,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:18,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:18,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:18,327 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:18,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-15 15:57:18,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:57:18,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:18,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:19,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:19,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 132 [2022-03-15 15:57:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:19,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:20,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:20,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 204 [2022-03-15 15:57:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:20,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343000522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:20,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:20,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 15:57:20,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374901355] [2022-03-15 15:57:20,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:20,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:57:20,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:57:20,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:57:20,513 INFO L87 Difference]: Start difference. First operand 64 states and 105 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:22,737 INFO L93 Difference]: Finished difference Result 298 states and 440 transitions. [2022-03-15 15:57:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 15:57:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:22,738 INFO L225 Difference]: With dead ends: 298 [2022-03-15 15:57:22,738 INFO L226 Difference]: Without dead ends: 266 [2022-03-15 15:57:22,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 16 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=721, Invalid=3439, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 15:57:22,738 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 256 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:22,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 349 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 913 Invalid, 0 Unknown, 121 Unchecked, 0.4s Time] [2022-03-15 15:57:22,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-15 15:57:22,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 65. [2022-03-15 15:57:22,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 105 transitions. [2022-03-15 15:57:22,741 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 105 transitions. Word has length 18 [2022-03-15 15:57:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:22,742 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 105 transitions. [2022-03-15 15:57:22,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:22,742 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 105 transitions. [2022-03-15 15:57:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:22,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:22,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:22,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:22,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2022-03-15 15:57:22,963 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:22,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1535224383, now seen corresponding path program 307 times [2022-03-15 15:57:22,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:22,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344388884] [2022-03-15 15:57:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:22,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:23,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:23,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344388884] [2022-03-15 15:57:23,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344388884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:23,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477878427] [2022-03-15 15:57:23,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:23,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:23,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:23,150 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:23,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-03-15 15:57:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:23,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:23,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:23,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:57:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:23,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:24,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:24,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:57:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:24,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477878427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:24,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:24,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:57:24,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011538801] [2022-03-15 15:57:24,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:24,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:57:24,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:57:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:57:24,693 INFO L87 Difference]: Start difference. First operand 65 states and 105 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:57:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:25,044 INFO L93 Difference]: Finished difference Result 100 states and 153 transitions. [2022-03-15 15:57:25,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:25,044 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:57:25,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:25,045 INFO L225 Difference]: With dead ends: 100 [2022-03-15 15:57:25,045 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 15:57:25,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:25,045 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:25,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 172 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:57:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 15:57:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2022-03-15 15:57:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 105 transitions. [2022-03-15 15:57:25,046 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 105 transitions. Word has length 18 [2022-03-15 15:57:25,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:25,046 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 105 transitions. [2022-03-15 15:57:25,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:57:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 105 transitions. [2022-03-15 15:57:25,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:25,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:25,046 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:25,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:25,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-03-15 15:57:25,256 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash -765277757, now seen corresponding path program 308 times [2022-03-15 15:57:25,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:25,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436536712] [2022-03-15 15:57:25,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:25,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:25,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:25,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436536712] [2022-03-15 15:57:25,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436536712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:25,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709649839] [2022-03-15 15:57:25,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:25,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:25,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:25,510 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:25,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-03-15 15:57:25,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:25,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:25,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:25,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:26,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:26,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 146 [2022-03-15 15:57:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:26,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:26,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:26,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 176 [2022-03-15 15:57:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:27,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709649839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:27,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:27,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:57:27,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573069250] [2022-03-15 15:57:27,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:27,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:57:27,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:27,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:57:27,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:57:27,154 INFO L87 Difference]: Start difference. First operand 65 states and 105 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:57:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:27,548 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2022-03-15 15:57:27,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:57:27,548 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:57:27,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:27,549 INFO L225 Difference]: With dead ends: 128 [2022-03-15 15:57:27,549 INFO L226 Difference]: Without dead ends: 108 [2022-03-15 15:57:27,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:57:27,549 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:27,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 162 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:57:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-15 15:57:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 64. [2022-03-15 15:57:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6349206349206349) internal successors, (103), 63 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 103 transitions. [2022-03-15 15:57:27,550 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 103 transitions. Word has length 18 [2022-03-15 15:57:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:27,550 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 103 transitions. [2022-03-15 15:57:27,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:57:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 103 transitions. [2022-03-15 15:57:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:27,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:27,550 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:27,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-03-15 15:57:27,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:27,751 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:27,751 INFO L85 PathProgramCache]: Analyzing trace with hash 78730623, now seen corresponding path program 309 times [2022-03-15 15:57:27,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:27,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658097920] [2022-03-15 15:57:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:27,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:27,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:27,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658097920] [2022-03-15 15:57:27,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658097920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:27,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569327915] [2022-03-15 15:57:27,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:27,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:27,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:27,911 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:27,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-03-15 15:57:28,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:57:28,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:28,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:28,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:28,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:28,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 144 [2022-03-15 15:57:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:28,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:29,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:29,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 174 [2022-03-15 15:57:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:29,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569327915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:29,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:29,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:57:29,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061549400] [2022-03-15 15:57:29,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:29,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:57:29,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:57:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:57:29,414 INFO L87 Difference]: Start difference. First operand 64 states and 103 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:57:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:29,850 INFO L93 Difference]: Finished difference Result 102 states and 150 transitions. [2022-03-15 15:57:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:57:29,850 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:57:29,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:29,851 INFO L225 Difference]: With dead ends: 102 [2022-03-15 15:57:29,851 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 15:57:29,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:57:29,851 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:29,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 157 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:57:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 15:57:29,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2022-03-15 15:57:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 62 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 100 transitions. [2022-03-15 15:57:29,852 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 100 transitions. Word has length 18 [2022-03-15 15:57:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:29,852 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 100 transitions. [2022-03-15 15:57:29,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:57:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 100 transitions. [2022-03-15 15:57:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:29,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:29,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:29,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:30,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-03-15 15:57:30,053 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:30,053 INFO L85 PathProgramCache]: Analyzing trace with hash 120743039, now seen corresponding path program 310 times [2022-03-15 15:57:30,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:30,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572110821] [2022-03-15 15:57:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:30,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:30,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:30,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572110821] [2022-03-15 15:57:30,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572110821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:30,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204499338] [2022-03-15 15:57:30,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:30,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:30,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:30,247 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:30,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-03-15 15:57:30,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:30,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:30,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:30,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:30,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:30,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 143 [2022-03-15 15:57:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:30,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:31,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:31,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 174 [2022-03-15 15:57:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:31,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204499338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:31,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:31,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2022-03-15 15:57:31,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904967679] [2022-03-15 15:57:31,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:31,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:57:31,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:31,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:57:31,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:57:31,599 INFO L87 Difference]: Start difference. First operand 63 states and 100 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:31,861 INFO L93 Difference]: Finished difference Result 76 states and 117 transitions. [2022-03-15 15:57:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:57:31,862 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:31,862 INFO L225 Difference]: With dead ends: 76 [2022-03-15 15:57:31,862 INFO L226 Difference]: Without dead ends: 66 [2022-03-15 15:57:31,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:57:31,862 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:31,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 89 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 288 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-03-15 15:57:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-15 15:57:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-15 15:57:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.6031746031746033) internal successors, (101), 63 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:31,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 101 transitions. [2022-03-15 15:57:31,863 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 101 transitions. Word has length 18 [2022-03-15 15:57:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:31,863 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 101 transitions. [2022-03-15 15:57:31,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 101 transitions. [2022-03-15 15:57:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:31,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:31,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:31,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-03-15 15:57:32,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-15 15:57:32,067 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1940116763, now seen corresponding path program 311 times [2022-03-15 15:57:32,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:32,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124999390] [2022-03-15 15:57:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:32,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:32,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124999390] [2022-03-15 15:57:32,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124999390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:32,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690436119] [2022-03-15 15:57:32,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:32,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:32,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:32,200 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:32,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-03-15 15:57:32,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:57:32,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:32,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:32,719 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 142 treesize of output 114 [2022-03-15 15:57:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:32,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:33,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:33,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 175 [2022-03-15 15:57:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:33,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690436119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:33,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:33,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 27 [2022-03-15 15:57:33,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287404412] [2022-03-15 15:57:33,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:33,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:57:33,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:33,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:57:33,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:57:33,537 INFO L87 Difference]: Start difference. First operand 64 states and 101 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:33,923 INFO L93 Difference]: Finished difference Result 79 states and 120 transitions. [2022-03-15 15:57:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:33,923 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:33,923 INFO L225 Difference]: With dead ends: 79 [2022-03-15 15:57:33,923 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 15:57:33,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:57:33,923 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:33,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 139 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:57:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 15:57:33,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-15 15:57:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.6) internal successors, (96), 60 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 96 transitions. [2022-03-15 15:57:33,924 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 96 transitions. Word has length 18 [2022-03-15 15:57:33,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:33,924 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 96 transitions. [2022-03-15 15:57:33,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 96 transitions. [2022-03-15 15:57:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:33,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:33,925 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:33,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-03-15 15:57:34,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-03-15 15:57:34,140 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:34,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:34,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1423127935, now seen corresponding path program 312 times [2022-03-15 15:57:34,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:34,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855081866] [2022-03-15 15:57:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:34,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:34,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:34,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855081866] [2022-03-15 15:57:34,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855081866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:34,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948046402] [2022-03-15 15:57:34,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:34,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:34,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:34,319 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:34,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-03-15 15:57:34,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:57:34,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:34,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:34,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:34,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:34,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 144 [2022-03-15 15:57:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:34,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:35,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:35,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 175 [2022-03-15 15:57:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:36,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948046402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:36,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:36,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:57:36,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862677931] [2022-03-15 15:57:36,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:36,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:36,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:36,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:36,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:36,036 INFO L87 Difference]: Start difference. First operand 61 states and 96 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:36,522 INFO L93 Difference]: Finished difference Result 84 states and 124 transitions. [2022-03-15 15:57:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:36,522 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:36,523 INFO L225 Difference]: With dead ends: 84 [2022-03-15 15:57:36,523 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 15:57:36,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=194, Invalid=1212, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 15:57:36,523 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 108 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:36,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 95 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 330 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-03-15 15:57:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 15:57:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2022-03-15 15:57:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 60 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 95 transitions. [2022-03-15 15:57:36,524 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 95 transitions. Word has length 18 [2022-03-15 15:57:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:36,524 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 95 transitions. [2022-03-15 15:57:36,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 95 transitions. [2022-03-15 15:57:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:36,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:36,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:36,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:36,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:36,741 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:36,741 INFO L85 PathProgramCache]: Analyzing trace with hash -637731867, now seen corresponding path program 313 times [2022-03-15 15:57:36,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:36,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974712345] [2022-03-15 15:57:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:36,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:36,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:36,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974712345] [2022-03-15 15:57:36,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974712345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:36,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733670218] [2022-03-15 15:57:36,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:36,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:36,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:36,955 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:36,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-03-15 15:57:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:37,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:37,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:37,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 122 [2022-03-15 15:57:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:37,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:38,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:38,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:57:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:38,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733670218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:38,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:38,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 26 [2022-03-15 15:57:38,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4132255] [2022-03-15 15:57:38,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:38,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:57:38,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:57:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:57:38,393 INFO L87 Difference]: Start difference. First operand 61 states and 95 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:57:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:38,584 INFO L93 Difference]: Finished difference Result 72 states and 109 transitions. [2022-03-15 15:57:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:57:38,584 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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 18 [2022-03-15 15:57:38,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:38,584 INFO L225 Difference]: With dead ends: 72 [2022-03-15 15:57:38,584 INFO L226 Difference]: Without dead ends: 57 [2022-03-15 15:57:38,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:38,585 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:38,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 244 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-03-15 15:57:38,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-15 15:57:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-15 15:57:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 56 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 90 transitions. [2022-03-15 15:57:38,585 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 90 transitions. Word has length 18 [2022-03-15 15:57:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:38,585 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 90 transitions. [2022-03-15 15:57:38,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:57:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 90 transitions. [2022-03-15 15:57:38,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:38,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:38,586 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:38,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:38,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:38,800 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:38,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash -308827385, now seen corresponding path program 314 times [2022-03-15 15:57:38,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:38,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692229119] [2022-03-15 15:57:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:38,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:39,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:39,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692229119] [2022-03-15 15:57:39,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692229119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:39,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900816967] [2022-03-15 15:57:39,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:39,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:39,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:39,011 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:39,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-03-15 15:57:39,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:39,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:39,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 136 [2022-03-15 15:57:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:39,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:40,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:40,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 172 [2022-03-15 15:57:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:40,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900816967] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:40,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:40,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:57:40,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404839766] [2022-03-15 15:57:40,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:40,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:57:40,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:57:40,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:57:40,579 INFO L87 Difference]: Start difference. First operand 57 states and 90 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:40,768 INFO L93 Difference]: Finished difference Result 87 states and 131 transitions. [2022-03-15 15:57:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:40,768 INFO L225 Difference]: With dead ends: 87 [2022-03-15 15:57:40,768 INFO L226 Difference]: Without dead ends: 76 [2022-03-15 15:57:40,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:57:40,768 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:40,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 135 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:57:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-15 15:57:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2022-03-15 15:57:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2022-03-15 15:57:40,769 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 18 [2022-03-15 15:57:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:40,769 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2022-03-15 15:57:40,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:40,769 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2022-03-15 15:57:40,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:40,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:40,770 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:40,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:40,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2022-03-15 15:57:40,987 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:40,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:40,987 INFO L85 PathProgramCache]: Analyzing trace with hash 995960771, now seen corresponding path program 315 times [2022-03-15 15:57:40,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:40,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585257105] [2022-03-15 15:57:40,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:40,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:41,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:41,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585257105] [2022-03-15 15:57:41,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585257105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:41,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209263874] [2022-03-15 15:57:41,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:41,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:41,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:41,161 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:41,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-03-15 15:57:41,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:57:41,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:41,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:41,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:41,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:41,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 118 [2022-03-15 15:57:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:41,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:42,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:42,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 173 [2022-03-15 15:57:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:42,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209263874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:42,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:42,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:57:42,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602173727] [2022-03-15 15:57:42,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:42,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:42,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:42,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:42,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:42,611 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 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) [2022-03-15 15:57:43,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:43,492 INFO L93 Difference]: Finished difference Result 158 states and 236 transitions. [2022-03-15 15:57:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:57:43,492 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 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 18 [2022-03-15 15:57:43,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:43,493 INFO L225 Difference]: With dead ends: 158 [2022-03-15 15:57:43,493 INFO L226 Difference]: Without dead ends: 148 [2022-03-15 15:57:43,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=405, Invalid=2045, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 15:57:43,493 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 174 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:43,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 171 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 484 Invalid, 0 Unknown, 3 Unchecked, 0.2s Time] [2022-03-15 15:57:43,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-15 15:57:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 57. [2022-03-15 15:57:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 56 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 90 transitions. [2022-03-15 15:57:43,494 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 90 transitions. Word has length 18 [2022-03-15 15:57:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:43,494 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 90 transitions. [2022-03-15 15:57:43,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 30 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) [2022-03-15 15:57:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 90 transitions. [2022-03-15 15:57:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:43,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:43,494 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:43,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:43,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:43,695 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:43,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:43,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1839969151, now seen corresponding path program 316 times [2022-03-15 15:57:43,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:43,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139599376] [2022-03-15 15:57:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:43,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:43,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:43,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139599376] [2022-03-15 15:57:43,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139599376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:43,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589281096] [2022-03-15 15:57:43,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:43,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:43,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:43,906 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:43,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-03-15 15:57:44,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:44,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:44,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:44,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:44,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:44,381 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 146 [2022-03-15 15:57:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:44,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:45,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:45,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 208 [2022-03-15 15:57:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:45,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589281096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:45,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:45,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:57:45,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357806726] [2022-03-15 15:57:45,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:45,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:57:45,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:57:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:57:45,232 INFO L87 Difference]: Start difference. First operand 57 states and 90 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:45,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:45,406 INFO L93 Difference]: Finished difference Result 87 states and 131 transitions. [2022-03-15 15:57:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:45,407 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:45,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:45,407 INFO L225 Difference]: With dead ends: 87 [2022-03-15 15:57:45,407 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:57:45,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:45,407 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:45,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 143 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 245 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-03-15 15:57:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:57:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2022-03-15 15:57:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2022-03-15 15:57:45,408 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 18 [2022-03-15 15:57:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:45,408 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2022-03-15 15:57:45,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2022-03-15 15:57:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:45,408 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:45,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:45,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:45,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:45,623 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash -220890651, now seen corresponding path program 317 times [2022-03-15 15:57:45,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:45,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549810691] [2022-03-15 15:57:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:45,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:45,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:45,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549810691] [2022-03-15 15:57:45,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549810691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:45,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845316127] [2022-03-15 15:57:45,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:57:45,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:45,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:45,823 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:45,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-03-15 15:57:46,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:57:46,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:46,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:46,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:46,315 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 152 treesize of output 120 [2022-03-15 15:57:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:46,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:46,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:46,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 191 [2022-03-15 15:57:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:47,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845316127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:47,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:47,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:57:47,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792212697] [2022-03-15 15:57:47,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:47,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:57:47,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:47,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:57:47,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:57:47,052 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:57:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:47,319 INFO L93 Difference]: Finished difference Result 88 states and 132 transitions. [2022-03-15 15:57:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:57:47,320 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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 18 [2022-03-15 15:57:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:47,320 INFO L225 Difference]: With dead ends: 88 [2022-03-15 15:57:47,320 INFO L226 Difference]: Without dead ends: 75 [2022-03-15 15:57:47,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:57:47,321 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:47,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 132 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:57:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-15 15:57:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2022-03-15 15:57:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 53 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2022-03-15 15:57:47,321 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 18 [2022-03-15 15:57:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:47,321 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2022-03-15 15:57:47,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:57:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2022-03-15 15:57:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:47,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:47,322 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:47,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-03-15 15:57:47,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:47,539 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:47,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:47,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1110823349, now seen corresponding path program 318 times [2022-03-15 15:57:47,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:47,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530956072] [2022-03-15 15:57:47,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:47,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:47,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:47,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530956072] [2022-03-15 15:57:47,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530956072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:47,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766165585] [2022-03-15 15:57:47,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:57:47,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:47,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:47,741 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:47,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-03-15 15:57:47,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:57:47,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:47,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:48,185 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 164 treesize of output 130 [2022-03-15 15:57:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:48,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:49,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:49,035 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 241 treesize of output 203 [2022-03-15 15:57:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:49,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766165585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:49,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:49,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:57:49,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808720579] [2022-03-15 15:57:49,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:49,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:57:49,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:57:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:57:49,290 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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) [2022-03-15 15:57:49,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:49,834 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2022-03-15 15:57:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:57:49,834 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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 18 [2022-03-15 15:57:49,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:49,834 INFO L225 Difference]: With dead ends: 82 [2022-03-15 15:57:49,834 INFO L226 Difference]: Without dead ends: 72 [2022-03-15 15:57:49,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:57:49,834 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:49,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 138 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:57:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-15 15:57:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2022-03-15 15:57:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 56 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 90 transitions. [2022-03-15 15:57:49,835 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 90 transitions. Word has length 18 [2022-03-15 15:57:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:49,835 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 90 transitions. [2022-03-15 15:57:49,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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) [2022-03-15 15:57:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 90 transitions. [2022-03-15 15:57:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:49,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:49,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:49,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-03-15 15:57:50,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-03-15 15:57:50,036 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash -266814969, now seen corresponding path program 319 times [2022-03-15 15:57:50,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:50,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394079822] [2022-03-15 15:57:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:50,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:50,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:50,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394079822] [2022-03-15 15:57:50,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394079822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:50,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663297000] [2022-03-15 15:57:50,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:57:50,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:50,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:50,326 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:50,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-03-15 15:57:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:50,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:50,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:50,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:50,975 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 126 [2022-03-15 15:57:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:51,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:52,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:52,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 176 [2022-03-15 15:57:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:52,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663297000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:52,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:52,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 24 [2022-03-15 15:57:52,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128370146] [2022-03-15 15:57:52,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:52,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:57:52,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:52,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:57:52,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:57:52,289 INFO L87 Difference]: Start difference. First operand 57 states and 90 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:52,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:52,758 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2022-03-15 15:57:52,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:57:52,759 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:52,759 INFO L225 Difference]: With dead ends: 66 [2022-03-15 15:57:52,759 INFO L226 Difference]: Without dead ends: 56 [2022-03-15 15:57:52,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:57:52,759 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:52,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 93 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 271 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-03-15 15:57:52,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-15 15:57:52,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-15 15:57:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2022-03-15 15:57:52,760 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 18 [2022-03-15 15:57:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:52,760 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2022-03-15 15:57:52,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2022-03-15 15:57:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:52,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:52,760 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:52,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:52,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-03-15 15:57:52,961 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:52,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1967292525, now seen corresponding path program 320 times [2022-03-15 15:57:52,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:52,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509448771] [2022-03-15 15:57:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:52,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:53,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:53,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509448771] [2022-03-15 15:57:53,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509448771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:53,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60357361] [2022-03-15 15:57:53,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:57:53,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:53,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:53,193 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:53,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-03-15 15:57:53,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:57:53,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:53,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:53,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:54,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:54,024 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 15:57:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:54,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:54,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:54,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 177 [2022-03-15 15:57:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:57:55,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60357361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:55,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:55,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 26 [2022-03-15 15:57:55,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42698079] [2022-03-15 15:57:55,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:55,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:57:55,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:55,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:57:55,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:57:55,106 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:57:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:55,288 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2022-03-15 15:57:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:57:55,288 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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 18 [2022-03-15 15:57:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:55,288 INFO L225 Difference]: With dead ends: 67 [2022-03-15 15:57:55,288 INFO L226 Difference]: Without dead ends: 55 [2022-03-15 15:57:55,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:57:55,289 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:55,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 117 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-03-15 15:57:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-15 15:57:55,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-15 15:57:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.5925925925925926) internal successors, (86), 54 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 86 transitions. [2022-03-15 15:57:55,289 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 86 transitions. Word has length 18 [2022-03-15 15:57:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:55,290 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 86 transitions. [2022-03-15 15:57:55,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:57:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 86 transitions. [2022-03-15 15:57:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:55,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:55,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:55,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-03-15 15:57:55,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-03-15 15:57:55,504 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:55,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:55,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1789819193, now seen corresponding path program 321 times [2022-03-15 15:57:55,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:55,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436555224] [2022-03-15 15:57:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:55,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:55,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:55,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436555224] [2022-03-15 15:57:55,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436555224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:55,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171865603] [2022-03-15 15:57:55,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:57:55,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:55,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:55,720 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:55,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-03-15 15:57:55,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:57:55,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:55,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:55,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:56,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:56,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 134 [2022-03-15 15:57:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:56,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:56,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:56,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 177 [2022-03-15 15:57:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:57,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171865603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:57,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:57,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 15:57:57,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788635024] [2022-03-15 15:57:57,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:57,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:57:57,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:57,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:57:57,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:57:57,185 INFO L87 Difference]: Start difference. First operand 55 states and 86 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:57,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:57:57,857 INFO L93 Difference]: Finished difference Result 140 states and 209 transitions. [2022-03-15 15:57:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:57:57,857 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:57:57,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:57:57,858 INFO L225 Difference]: With dead ends: 140 [2022-03-15 15:57:57,858 INFO L226 Difference]: Without dead ends: 125 [2022-03-15 15:57:57,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=359, Invalid=1897, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:57:57,858 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:57:57,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 198 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 397 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-03-15 15:57:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-15 15:57:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 53. [2022-03-15 15:57:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 52 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 83 transitions. [2022-03-15 15:57:57,859 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 83 transitions. Word has length 18 [2022-03-15 15:57:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:57:57,859 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 83 transitions. [2022-03-15 15:57:57,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:57:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 83 transitions. [2022-03-15 15:57:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:57:57,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:57:57,859 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:57:57,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-03-15 15:57:58,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-03-15 15:57:58,060 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:57:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:57:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1996621629, now seen corresponding path program 322 times [2022-03-15 15:57:58,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:57:58,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074213311] [2022-03-15 15:57:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:57:58,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:57:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:57:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:58,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:57:58,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074213311] [2022-03-15 15:57:58,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074213311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:57:58,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441524031] [2022-03-15 15:57:58,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:57:58,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:57:58,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:57:58,229 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:57:58,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-03-15 15:57:58,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:57:58,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:57:58,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:57:58,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:57:58,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:57:58,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 143 [2022-03-15 15:57:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:59,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:57:59,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:57:59,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 182 [2022-03-15 15:57:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:57:59,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441524031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:57:59,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:57:59,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:57:59,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252352209] [2022-03-15 15:57:59,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:57:59,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:57:59,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:57:59,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:57:59,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:57:59,883 INFO L87 Difference]: Start difference. First operand 53 states and 83 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 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) [2022-03-15 15:58:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:00,089 INFO L93 Difference]: Finished difference Result 78 states and 117 transitions. [2022-03-15 15:58:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:58:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 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 18 [2022-03-15 15:58:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:00,089 INFO L225 Difference]: With dead ends: 78 [2022-03-15 15:58:00,089 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 15:58:00,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:00,090 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:00,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 127 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 313 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-03-15 15:58:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 15:58:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2022-03-15 15:58:00,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 56 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 90 transitions. [2022-03-15 15:58:00,090 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 90 transitions. Word has length 18 [2022-03-15 15:58:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:00,090 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 90 transitions. [2022-03-15 15:58:00,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 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) [2022-03-15 15:58:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 90 transitions. [2022-03-15 15:58:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:00,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:00,091 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:00,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:00,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:00,307 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:00,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1152613249, now seen corresponding path program 323 times [2022-03-15 15:58:00,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:00,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456764705] [2022-03-15 15:58:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:00,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:00,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:00,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456764705] [2022-03-15 15:58:00,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456764705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:00,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907497694] [2022-03-15 15:58:00,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:00,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:00,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:00,502 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:00,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-03-15 15:58:00,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:00,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:00,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:00,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:01,109 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 148 treesize of output 118 [2022-03-15 15:58:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:01,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:02,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:02,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:58:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:02,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907497694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:02,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:02,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-03-15 15:58:02,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960373775] [2022-03-15 15:58:02,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:02,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:58:02,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:02,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:58:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:02,473 INFO L87 Difference]: Start difference. First operand 57 states and 90 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 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) [2022-03-15 15:58:02,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:02,913 INFO L93 Difference]: Finished difference Result 83 states and 123 transitions. [2022-03-15 15:58:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:58:02,914 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 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 18 [2022-03-15 15:58:02,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:02,914 INFO L225 Difference]: With dead ends: 83 [2022-03-15 15:58:02,914 INFO L226 Difference]: Without dead ends: 73 [2022-03-15 15:58:02,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 15:58:02,914 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:02,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 164 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:02,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-15 15:58:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2022-03-15 15:58:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2022-03-15 15:58:02,915 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 18 [2022-03-15 15:58:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:02,915 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2022-03-15 15:58:02,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 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) [2022-03-15 15:58:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2022-03-15 15:58:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:02,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:02,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:02,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:03,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:03,116 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:03,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1081494245, now seen corresponding path program 324 times [2022-03-15 15:58:03,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:03,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856697211] [2022-03-15 15:58:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:03,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:03,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:03,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856697211] [2022-03-15 15:58:03,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856697211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:03,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938973163] [2022-03-15 15:58:03,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:03,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:03,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:03,408 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:03,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-03-15 15:58:03,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:03,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:03,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:03,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:04,100 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 164 treesize of output 130 [2022-03-15 15:58:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:04,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:05,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:05,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 247 treesize of output 205 [2022-03-15 15:58:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:05,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938973163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:05,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:05,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-03-15 15:58:05,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835812089] [2022-03-15 15:58:05,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:05,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:58:05,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:05,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:58:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:05,441 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:05,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:05,651 INFO L93 Difference]: Finished difference Result 73 states and 111 transitions. [2022-03-15 15:58:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:58:05,652 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:05,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:05,652 INFO L225 Difference]: With dead ends: 73 [2022-03-15 15:58:05,652 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 15:58:05,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:58:05,652 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:05,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 126 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 15:58:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2022-03-15 15:58:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.5925925925925926) internal successors, (86), 54 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 86 transitions. [2022-03-15 15:58:05,653 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 86 transitions. Word has length 18 [2022-03-15 15:58:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:05,653 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 86 transitions. [2022-03-15 15:58:05,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 86 transitions. [2022-03-15 15:58:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:05,653 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:05,653 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:05,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:05,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-03-15 15:58:05,868 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1619349823, now seen corresponding path program 325 times [2022-03-15 15:58:05,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:05,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810900137] [2022-03-15 15:58:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:05,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:06,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:06,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810900137] [2022-03-15 15:58:06,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810900137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:06,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883783446] [2022-03-15 15:58:06,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:06,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:06,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:06,116 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:06,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-03-15 15:58:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:06,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:06,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:06,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:06,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:58:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:06,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:07,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:07,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:58:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:07,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883783446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:07,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:07,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:58:07,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809692934] [2022-03-15 15:58:07,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:07,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:58:07,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:58:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:07,743 INFO L87 Difference]: Start difference. First operand 55 states and 86 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 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) [2022-03-15 15:58:07,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:07,892 INFO L93 Difference]: Finished difference Result 68 states and 103 transitions. [2022-03-15 15:58:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:58:07,892 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 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 18 [2022-03-15 15:58:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:07,892 INFO L225 Difference]: With dead ends: 68 [2022-03-15 15:58:07,892 INFO L226 Difference]: Without dead ends: 54 [2022-03-15 15:58:07,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:58:07,893 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:07,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 134 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-03-15 15:58:07,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-15 15:58:07,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-15 15:58:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 53 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 84 transitions. [2022-03-15 15:58:07,893 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 84 transitions. Word has length 18 [2022-03-15 15:58:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:07,893 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 84 transitions. [2022-03-15 15:58:07,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 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) [2022-03-15 15:58:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 84 transitions. [2022-03-15 15:58:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:07,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:07,894 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:07,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:08,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:08,106 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:08,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1113003557, now seen corresponding path program 326 times [2022-03-15 15:58:08,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:08,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690053229] [2022-03-15 15:58:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:08,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:08,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:08,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690053229] [2022-03-15 15:58:08,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690053229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:08,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102019990] [2022-03-15 15:58:08,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:08,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:08,410 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:08,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-03-15 15:58:08,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:08,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:08,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:08,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:09,018 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 152 treesize of output 122 [2022-03-15 15:58:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:09,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:09,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:09,833 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 211 treesize of output 177 [2022-03-15 15:58:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:10,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102019990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:10,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:10,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:58:10,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116177487] [2022-03-15 15:58:10,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:10,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:58:10,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:10,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:58:10,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:58:10,018 INFO L87 Difference]: Start difference. First operand 54 states and 84 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:10,192 INFO L93 Difference]: Finished difference Result 69 states and 104 transitions. [2022-03-15 15:58:10,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:58:10,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:10,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:10,192 INFO L225 Difference]: With dead ends: 69 [2022-03-15 15:58:10,192 INFO L226 Difference]: Without dead ends: 50 [2022-03-15 15:58:10,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:10,192 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:10,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 134 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-15 15:58:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-15 15:58:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 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) [2022-03-15 15:58:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 79 transitions. [2022-03-15 15:58:10,193 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 79 transitions. Word has length 18 [2022-03-15 15:58:10,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:10,193 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 79 transitions. [2022-03-15 15:58:10,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 79 transitions. [2022-03-15 15:58:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:10,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:10,193 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:10,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:10,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:10,403 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash -969892593, now seen corresponding path program 327 times [2022-03-15 15:58:10,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:10,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394841541] [2022-03-15 15:58:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:10,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:10,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:10,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394841541] [2022-03-15 15:58:10,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394841541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:10,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834662887] [2022-03-15 15:58:10,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:10,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:10,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:10,605 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:10,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-03-15 15:58:10,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:58:10,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:10,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:58:10,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:11,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:11,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 112 [2022-03-15 15:58:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:11,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:11,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:11,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:58:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:12,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834662887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:12,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:12,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:58:12,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904856983] [2022-03-15 15:58:12,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:12,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:58:12,083 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:58:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:12,083 INFO L87 Difference]: Start difference. First operand 50 states and 79 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:58:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:12,330 INFO L93 Difference]: Finished difference Result 72 states and 114 transitions. [2022-03-15 15:58:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:12,330 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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 18 [2022-03-15 15:58:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:12,330 INFO L225 Difference]: With dead ends: 72 [2022-03-15 15:58:12,330 INFO L226 Difference]: Without dead ends: 65 [2022-03-15 15:58:12,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 15:58:12,331 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:12,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 175 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 333 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-03-15 15:58:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-15 15:58:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2022-03-15 15:58:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 53 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 85 transitions. [2022-03-15 15:58:12,332 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 85 transitions. Word has length 18 [2022-03-15 15:58:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:12,332 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 85 transitions. [2022-03-15 15:58:12,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:58:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 85 transitions. [2022-03-15 15:58:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:12,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:12,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:12,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:12,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:12,542 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:12,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:12,543 INFO L85 PathProgramCache]: Analyzing trace with hash -771484533, now seen corresponding path program 328 times [2022-03-15 15:58:12,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:12,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803196827] [2022-03-15 15:58:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:12,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:12,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803196827] [2022-03-15 15:58:12,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803196827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:12,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102189850] [2022-03-15 15:58:12,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:12,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:12,756 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:12,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-03-15 15:58:13,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:13,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:13,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:13,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:13,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:13,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:58:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:13,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:14,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:14,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:58:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:14,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102189850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:14,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:14,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:58:14,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674017649] [2022-03-15 15:58:14,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:14,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:58:14,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:14,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:58:14,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:14,459 INFO L87 Difference]: Start difference. First operand 54 states and 85 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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) [2022-03-15 15:58:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:14,687 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2022-03-15 15:58:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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 18 [2022-03-15 15:58:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:14,688 INFO L225 Difference]: With dead ends: 82 [2022-03-15 15:58:14,688 INFO L226 Difference]: Without dead ends: 70 [2022-03-15 15:58:14,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:58:14,688 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:14,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 165 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-15 15:58:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2022-03-15 15:58:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 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) [2022-03-15 15:58:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 73 transitions. [2022-03-15 15:58:14,689 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 73 transitions. Word has length 18 [2022-03-15 15:58:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:14,689 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 73 transitions. [2022-03-15 15:58:14,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 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) [2022-03-15 15:58:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 73 transitions. [2022-03-15 15:58:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:14,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:14,689 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:14,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:14,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:14,899 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:14,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash 728985099, now seen corresponding path program 329 times [2022-03-15 15:58:14,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:14,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905564521] [2022-03-15 15:58:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:14,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:15,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:15,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905564521] [2022-03-15 15:58:15,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905564521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:15,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616518142] [2022-03-15 15:58:15,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:15,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:15,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:15,130 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:15,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-03-15 15:58:15,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:58:15,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:15,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:15,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:15,641 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 144 treesize of output 116 [2022-03-15 15:58:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:15,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:16,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:16,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 221 [2022-03-15 15:58:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:16,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616518142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:16,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:16,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:58:16,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499347450] [2022-03-15 15:58:16,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:16,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:58:16,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:58:16,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:58:16,514 INFO L87 Difference]: Start difference. First operand 47 states and 73 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-03-15 15:58:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:16,900 INFO L93 Difference]: Finished difference Result 94 states and 140 transitions. [2022-03-15 15:58:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:16,900 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 18 [2022-03-15 15:58:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:16,901 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:58:16,901 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 15:58:16,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:58:16,901 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:16,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 208 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 15:58:16,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2022-03-15 15:58:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 46 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) [2022-03-15 15:58:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 73 transitions. [2022-03-15 15:58:16,902 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 73 transitions. Word has length 18 [2022-03-15 15:58:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:16,902 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 73 transitions. [2022-03-15 15:58:16,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-03-15 15:58:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 73 transitions. [2022-03-15 15:58:16,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:16,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:16,902 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:16,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:17,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-03-15 15:58:17,115 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:17,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1571517041, now seen corresponding path program 330 times [2022-03-15 15:58:17,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:17,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549115772] [2022-03-15 15:58:17,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:17,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:17,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:17,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549115772] [2022-03-15 15:58:17,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549115772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:17,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061463884] [2022-03-15 15:58:17,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:17,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:17,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:17,460 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:17,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-03-15 15:58:17,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:58:17,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:17,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:17,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:17,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:17,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 146 [2022-03-15 15:58:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:18,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:18,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:18,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 242 treesize of output 204 [2022-03-15 15:58:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:19,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061463884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:19,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:19,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:58:19,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088902128] [2022-03-15 15:58:19,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:19,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:58:19,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:19,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:58:19,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:58:19,001 INFO L87 Difference]: Start difference. First operand 47 states and 73 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:58:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:19,581 INFO L93 Difference]: Finished difference Result 111 states and 157 transitions. [2022-03-15 15:58:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:19,581 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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 18 [2022-03-15 15:58:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:19,582 INFO L225 Difference]: With dead ends: 111 [2022-03-15 15:58:19,582 INFO L226 Difference]: Without dead ends: 91 [2022-03-15 15:58:19,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:58:19,582 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:19,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 154 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:19,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-15 15:58:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 48. [2022-03-15 15:58:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.574468085106383) internal successors, (74), 47 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) [2022-03-15 15:58:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 74 transitions. [2022-03-15 15:58:19,583 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 74 transitions. Word has length 18 [2022-03-15 15:58:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:19,583 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 74 transitions. [2022-03-15 15:58:19,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:58:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 74 transitions. [2022-03-15 15:58:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:19,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:19,583 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:19,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:19,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-03-15 15:58:19,783 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:19,784 INFO L85 PathProgramCache]: Analyzing trace with hash -727508661, now seen corresponding path program 331 times [2022-03-15 15:58:19,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:19,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288864657] [2022-03-15 15:58:19,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:19,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:20,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:20,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288864657] [2022-03-15 15:58:20,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288864657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:20,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396611365] [2022-03-15 15:58:20,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:20,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:20,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:20,009 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:20,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-03-15 15:58:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:20,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:20,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:20,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 146 [2022-03-15 15:58:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:20,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:21,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:21,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 175 [2022-03-15 15:58:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:21,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396611365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:21,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:21,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:58:21,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361992480] [2022-03-15 15:58:21,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:21,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:58:21,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:21,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:58:21,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:21,462 INFO L87 Difference]: Start difference. First operand 48 states and 74 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:21,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:21,836 INFO L93 Difference]: Finished difference Result 87 states and 125 transitions. [2022-03-15 15:58:21,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 15:58:21,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:21,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:21,836 INFO L225 Difference]: With dead ends: 87 [2022-03-15 15:58:21,836 INFO L226 Difference]: Without dead ends: 64 [2022-03-15 15:58:21,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:21,836 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:21,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 160 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:21,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-15 15:58:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2022-03-15 15:58:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 44 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2022-03-15 15:58:21,837 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 18 [2022-03-15 15:58:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:21,837 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2022-03-15 15:58:21,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2022-03-15 15:58:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:21,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:21,838 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:21,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:22,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable344,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:22,044 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1529504625, now seen corresponding path program 332 times [2022-03-15 15:58:22,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:22,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789953993] [2022-03-15 15:58:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:22,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:22,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:22,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789953993] [2022-03-15 15:58:22,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789953993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:22,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294334336] [2022-03-15 15:58:22,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:22,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:22,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:22,232 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:22,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-03-15 15:58:22,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:22,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:22,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:22,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:22,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:22,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 143 [2022-03-15 15:58:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:22,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:23,682 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:23,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 200 [2022-03-15 15:58:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:23,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294334336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:23,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:23,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:58:23,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880000556] [2022-03-15 15:58:23,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:23,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:58:23,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:23,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:58:23,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:58:23,962 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:24,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:24,255 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2022-03-15 15:58:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:24,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:24,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:24,255 INFO L225 Difference]: With dead ends: 70 [2022-03-15 15:58:24,255 INFO L226 Difference]: Without dead ends: 60 [2022-03-15 15:58:24,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:24,255 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 44 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:24,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 94 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 273 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-03-15 15:58:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-15 15:58:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2022-03-15 15:58:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.565217391304348) internal successors, (72), 46 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 72 transitions. [2022-03-15 15:58:24,256 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 72 transitions. Word has length 18 [2022-03-15 15:58:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:24,256 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 72 transitions. [2022-03-15 15:58:24,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 72 transitions. [2022-03-15 15:58:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:24,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:24,257 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:24,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:24,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-03-15 15:58:24,457 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:24,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:24,457 INFO L85 PathProgramCache]: Analyzing trace with hash -685496245, now seen corresponding path program 333 times [2022-03-15 15:58:24,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:24,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992524520] [2022-03-15 15:58:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:24,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:24,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:24,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992524520] [2022-03-15 15:58:24,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992524520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:24,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079364666] [2022-03-15 15:58:24,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:24,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:24,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:24,658 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:24,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-03-15 15:58:24,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:58:24,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:24,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:24,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:25,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:25,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 128 [2022-03-15 15:58:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:25,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:25,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:25,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 212 [2022-03-15 15:58:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:26,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079364666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:26,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:26,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:58:26,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691810843] [2022-03-15 15:58:26,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:26,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:58:26,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:26,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:58:26,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:58:26,098 INFO L87 Difference]: Start difference. First operand 47 states and 72 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:26,318 INFO L93 Difference]: Finished difference Result 58 states and 86 transitions. [2022-03-15 15:58:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:26,318 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:26,318 INFO L225 Difference]: With dead ends: 58 [2022-03-15 15:58:26,318 INFO L226 Difference]: Without dead ends: 48 [2022-03-15 15:58:26,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:26,319 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:26,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 72 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 280 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-03-15 15:58:26,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-15 15:58:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-03-15 15:58:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 70 transitions. [2022-03-15 15:58:26,319 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 70 transitions. Word has length 18 [2022-03-15 15:58:26,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:26,319 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 70 transitions. [2022-03-15 15:58:26,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 70 transitions. [2022-03-15 15:58:26,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:26,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:26,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:26,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:26,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2022-03-15 15:58:26,536 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:26,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:26,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1548611249, now seen corresponding path program 334 times [2022-03-15 15:58:26,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:26,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716236917] [2022-03-15 15:58:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:26,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:26,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:26,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716236917] [2022-03-15 15:58:26,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716236917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:26,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061312503] [2022-03-15 15:58:26,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:26,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:26,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:26,669 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:26,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-03-15 15:58:26,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:26,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:26,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:26,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:27,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:27,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 120 [2022-03-15 15:58:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:27,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:27,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:27,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 204 [2022-03-15 15:58:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:27,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061312503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:27,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:27,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-03-15 15:58:27,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52946262] [2022-03-15 15:58:27,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:27,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:58:27,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:27,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:58:27,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:58:27,995 INFO L87 Difference]: Start difference. First operand 46 states and 70 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:28,235 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2022-03-15 15:58:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:58:28,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:28,236 INFO L225 Difference]: With dead ends: 70 [2022-03-15 15:58:28,236 INFO L226 Difference]: Without dead ends: 43 [2022-03-15 15:58:28,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:28,236 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:28,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 125 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 295 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-03-15 15:58:28,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-15 15:58:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-15 15:58:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 42 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) [2022-03-15 15:58:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 65 transitions. [2022-03-15 15:58:28,237 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 65 transitions. Word has length 18 [2022-03-15 15:58:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:28,237 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 65 transitions. [2022-03-15 15:58:28,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 65 transitions. [2022-03-15 15:58:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:28,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:28,237 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:28,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:28,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2022-03-15 15:58:28,437 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:28,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:28,438 INFO L85 PathProgramCache]: Analyzing trace with hash -227119729, now seen corresponding path program 335 times [2022-03-15 15:58:28,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:28,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765655211] [2022-03-15 15:58:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:28,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:28,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:28,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765655211] [2022-03-15 15:58:28,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765655211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:28,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971099220] [2022-03-15 15:58:28,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:28,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:28,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:28,730 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:28,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-03-15 15:58:28,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:58:28,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:28,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:29,295 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 157 treesize of output 123 [2022-03-15 15:58:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:29,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:30,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:30,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 200 treesize of output 174 [2022-03-15 15:58:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:30,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971099220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:30,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:30,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:58:30,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426168620] [2022-03-15 15:58:30,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:30,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:58:30,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:30,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:58:30,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:58:30,693 INFO L87 Difference]: Start difference. First operand 43 states and 65 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:31,007 INFO L93 Difference]: Finished difference Result 74 states and 109 transitions. [2022-03-15 15:58:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:31,008 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:31,008 INFO L225 Difference]: With dead ends: 74 [2022-03-15 15:58:31,008 INFO L226 Difference]: Without dead ends: 64 [2022-03-15 15:58:31,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:31,008 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:31,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 137 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-15 15:58:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2022-03-15 15:58:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 70 transitions. [2022-03-15 15:58:31,009 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 70 transitions. Word has length 18 [2022-03-15 15:58:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:31,009 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 70 transitions. [2022-03-15 15:58:31,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 70 transitions. [2022-03-15 15:58:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:31,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:31,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:31,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:31,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2022-03-15 15:58:31,210 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 616888651, now seen corresponding path program 336 times [2022-03-15 15:58:31,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:31,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15302997] [2022-03-15 15:58:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:31,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:31,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:31,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15302997] [2022-03-15 15:58:31,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15302997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:31,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826565196] [2022-03-15 15:58:31,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:31,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:31,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:31,422 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:31,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-03-15 15:58:31,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:58:31,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:31,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:32,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:32,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 146 [2022-03-15 15:58:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:32,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:32,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:32,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 176 [2022-03-15 15:58:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:33,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826565196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:33,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:33,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:58:33,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107786296] [2022-03-15 15:58:33,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:33,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:58:33,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:33,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:58:33,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:33,128 INFO L87 Difference]: Start difference. First operand 46 states and 70 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:58:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:33,411 INFO L93 Difference]: Finished difference Result 58 states and 87 transitions. [2022-03-15 15:58:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:33,411 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 18 [2022-03-15 15:58:33,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:33,411 INFO L225 Difference]: With dead ends: 58 [2022-03-15 15:58:33,411 INFO L226 Difference]: Without dead ends: 48 [2022-03-15 15:58:33,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:33,418 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:33,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 98 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 334 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-03-15 15:58:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-15 15:58:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-03-15 15:58:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 44 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 68 transitions. [2022-03-15 15:58:33,419 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 68 transitions. Word has length 18 [2022-03-15 15:58:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:33,419 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 68 transitions. [2022-03-15 15:58:33,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:58:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 68 transitions. [2022-03-15 15:58:33,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:33,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:33,419 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:33,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-03-15 15:58:33,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:33,620 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:33,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1443971151, now seen corresponding path program 337 times [2022-03-15 15:58:33,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:33,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845791643] [2022-03-15 15:58:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:33,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:33,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:33,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845791643] [2022-03-15 15:58:33,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845791643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:33,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265306803] [2022-03-15 15:58:33,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:33,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:33,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:33,843 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:33,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-03-15 15:58:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:34,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:34,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:34,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:34,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 120 [2022-03-15 15:58:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:34,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:35,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:35,354 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 211 treesize of output 177 [2022-03-15 15:58:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:35,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265306803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:35,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:35,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:58:35,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913796459] [2022-03-15 15:58:35,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:35,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:58:35,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:35,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:58:35,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:35,494 INFO L87 Difference]: Start difference. First operand 45 states and 68 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:58:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:35,675 INFO L93 Difference]: Finished difference Result 58 states and 86 transitions. [2022-03-15 15:58:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:58:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 18 [2022-03-15 15:58:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:35,675 INFO L225 Difference]: With dead ends: 58 [2022-03-15 15:58:35,675 INFO L226 Difference]: Without dead ends: 46 [2022-03-15 15:58:35,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:58:35,675 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:35,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 111 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 314 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-15 15:58:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-15 15:58:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-03-15 15:58:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 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) [2022-03-15 15:58:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 66 transitions. [2022-03-15 15:58:35,676 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 66 transitions. Word has length 18 [2022-03-15 15:58:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:35,676 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 66 transitions. [2022-03-15 15:58:35,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:58:35,676 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 66 transitions. [2022-03-15 15:58:35,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:35,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:35,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:35,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-03-15 15:58:35,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:35,882 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:35,882 INFO L85 PathProgramCache]: Analyzing trace with hash -906115573, now seen corresponding path program 338 times [2022-03-15 15:58:35,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:35,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541595512] [2022-03-15 15:58:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:35,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:36,092 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:36,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541595512] [2022-03-15 15:58:36,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541595512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:36,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286633181] [2022-03-15 15:58:36,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:36,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:36,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:36,093 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:36,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-03-15 15:58:36,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:36,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:36,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:36,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:36,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:36,769 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:58:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:36,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:37,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:37,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 247 treesize of output 205 [2022-03-15 15:58:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:37,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286633181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:37,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:37,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:58:37,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760902960] [2022-03-15 15:58:37,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:37,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:58:37,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:37,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:58:37,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:37,705 INFO L87 Difference]: Start difference. First operand 44 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:58:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:37,792 INFO L93 Difference]: Finished difference Result 58 states and 85 transitions. [2022-03-15 15:58:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 15:58:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 18 [2022-03-15 15:58:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:37,793 INFO L225 Difference]: With dead ends: 58 [2022-03-15 15:58:37,793 INFO L226 Difference]: Without dead ends: 42 [2022-03-15 15:58:37,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:58:37,793 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:37,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 116 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 211 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-03-15 15:58:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-15 15:58:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-15 15:58:37,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 62 transitions. [2022-03-15 15:58:37,794 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 62 transitions. Word has length 18 [2022-03-15 15:58:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:37,794 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 62 transitions. [2022-03-15 15:58:37,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:58:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 62 transitions. [2022-03-15 15:58:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:37,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:37,794 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:37,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:38,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:38,011 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:38,011 INFO L85 PathProgramCache]: Analyzing trace with hash 341427091, now seen corresponding path program 339 times [2022-03-15 15:58:38,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:38,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324418067] [2022-03-15 15:58:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:38,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:38,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:38,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324418067] [2022-03-15 15:58:38,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324418067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:38,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235517241] [2022-03-15 15:58:38,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:38,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:38,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:38,181 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:38,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-03-15 15:58:38,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 15:58:38,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:38,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:38,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:38,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:38,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:58:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:38,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:39,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:39,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 191 [2022-03-15 15:58:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:39,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235517241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:39,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:39,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 24 [2022-03-15 15:58:39,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678012153] [2022-03-15 15:58:39,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:39,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:58:39,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:39,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:58:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:58:39,704 INFO L87 Difference]: Start difference. First operand 41 states and 62 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:39,918 INFO L93 Difference]: Finished difference Result 79 states and 118 transitions. [2022-03-15 15:58:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:39,919 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:39,919 INFO L225 Difference]: With dead ends: 79 [2022-03-15 15:58:39,919 INFO L226 Difference]: Without dead ends: 66 [2022-03-15 15:58:39,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:58:39,919 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:39,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 143 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-15 15:58:39,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2022-03-15 15:58:39,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 44 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2022-03-15 15:58:39,920 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 18 [2022-03-15 15:58:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:39,920 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2022-03-15 15:58:39,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2022-03-15 15:58:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:39,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:39,920 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:39,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:40,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:40,134 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:40,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1959075049, now seen corresponding path program 340 times [2022-03-15 15:58:40,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:40,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629581467] [2022-03-15 15:58:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:40,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:40,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:40,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629581467] [2022-03-15 15:58:40,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629581467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:40,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961190492] [2022-03-15 15:58:40,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:40,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:40,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:40,330 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:40,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-03-15 15:58:40,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:40,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:40,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:40,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:40,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:40,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 128 [2022-03-15 15:58:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:41,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:41,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:41,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 180 [2022-03-15 15:58:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:41,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961190492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:41,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:41,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 24 [2022-03-15 15:58:41,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164260983] [2022-03-15 15:58:41,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:41,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:58:41,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:41,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:58:41,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:58:41,997 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:42,258 INFO L93 Difference]: Finished difference Result 88 states and 127 transitions. [2022-03-15 15:58:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:42,258 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:42,259 INFO L225 Difference]: With dead ends: 88 [2022-03-15 15:58:42,259 INFO L226 Difference]: Without dead ends: 78 [2022-03-15 15:58:42,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:58:42,259 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:42,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 159 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-15 15:58:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 46. [2022-03-15 15:58:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 70 transitions. [2022-03-15 15:58:42,260 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 70 transitions. Word has length 18 [2022-03-15 15:58:42,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:42,260 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 70 transitions. [2022-03-15 15:58:42,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:42,260 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 70 transitions. [2022-03-15 15:58:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:42,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:42,260 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:42,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:42,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:42,460 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1115066669, now seen corresponding path program 341 times [2022-03-15 15:58:42,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:42,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359521924] [2022-03-15 15:58:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:42,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:42,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:42,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359521924] [2022-03-15 15:58:42,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359521924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:42,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648290319] [2022-03-15 15:58:42,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:42,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:42,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:42,737 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:42,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-03-15 15:58:42,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:58:42,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:42,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:42,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:43,373 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 184 treesize of output 144 [2022-03-15 15:58:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:43,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:44,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:44,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 173 [2022-03-15 15:58:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:44,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648290319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:44,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:44,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:58:44,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033413889] [2022-03-15 15:58:44,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:44,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:58:44,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:44,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:58:44,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:44,540 INFO L87 Difference]: Start difference. First operand 46 states and 70 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:44,887 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2022-03-15 15:58:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:44,887 INFO L225 Difference]: With dead ends: 76 [2022-03-15 15:58:44,887 INFO L226 Difference]: Without dead ends: 65 [2022-03-15 15:58:44,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:44,888 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:44,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 172 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:58:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-15 15:58:44,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 44. [2022-03-15 15:58:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.558139534883721) internal successors, (67), 43 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) [2022-03-15 15:58:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 67 transitions. [2022-03-15 15:58:44,888 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 67 transitions. Word has length 18 [2022-03-15 15:58:44,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:44,888 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 67 transitions. [2022-03-15 15:58:44,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 67 transitions. [2022-03-15 15:58:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:44,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:44,889 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:44,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:45,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-03-15 15:58:45,089 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash 189721487, now seen corresponding path program 342 times [2022-03-15 15:58:45,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:45,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885588818] [2022-03-15 15:58:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:45,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:45,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:45,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885588818] [2022-03-15 15:58:45,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885588818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:45,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071017904] [2022-03-15 15:58:45,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:45,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:45,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:45,293 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:45,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-03-15 15:58:45,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:58:45,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:45,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:45,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:45,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 118 [2022-03-15 15:58:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:46,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:46,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:46,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 201 [2022-03-15 15:58:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:46,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071017904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:46,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:46,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:58:46,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279564690] [2022-03-15 15:58:46,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:46,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:58:46,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:46,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:58:46,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:46,879 INFO L87 Difference]: Start difference. First operand 44 states and 67 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:47,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:47,373 INFO L93 Difference]: Finished difference Result 134 states and 193 transitions. [2022-03-15 15:58:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:58:47,373 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:47,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:47,373 INFO L225 Difference]: With dead ends: 134 [2022-03-15 15:58:47,373 INFO L226 Difference]: Without dead ends: 124 [2022-03-15 15:58:47,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:58:47,374 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 186 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:47,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 169 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 475 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-03-15 15:58:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-15 15:58:47,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 46. [2022-03-15 15:58:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 70 transitions. [2022-03-15 15:58:47,374 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 70 transitions. Word has length 18 [2022-03-15 15:58:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:47,375 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 70 transitions. [2022-03-15 15:58:47,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 70 transitions. [2022-03-15 15:58:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:47,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:47,375 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:47,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-03-15 15:58:47,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-03-15 15:58:47,580 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:47,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1033729867, now seen corresponding path program 343 times [2022-03-15 15:58:47,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:47,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103197242] [2022-03-15 15:58:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:47,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:47,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:47,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103197242] [2022-03-15 15:58:47,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103197242] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:47,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121063893] [2022-03-15 15:58:47,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:58:47,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:47,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:47,807 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:47,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-03-15 15:58:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:48,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:48,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:48,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:48,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 126 [2022-03-15 15:58:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:48,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:49,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:49,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 183 [2022-03-15 15:58:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:49,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121063893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:49,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:49,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 24 [2022-03-15 15:58:49,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800030538] [2022-03-15 15:58:49,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:49,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:58:49,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:49,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:58:49,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:58:49,196 INFO L87 Difference]: Start difference. First operand 46 states and 70 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:49,406 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2022-03-15 15:58:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:49,407 INFO L225 Difference]: With dead ends: 76 [2022-03-15 15:58:49,407 INFO L226 Difference]: Without dead ends: 66 [2022-03-15 15:58:49,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:58:49,407 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:49,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 155 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 335 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-03-15 15:58:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-15 15:58:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2022-03-15 15:58:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 44 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 68 transitions. [2022-03-15 15:58:49,408 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 68 transitions. Word has length 18 [2022-03-15 15:58:49,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:49,408 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 68 transitions. [2022-03-15 15:58:49,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 68 transitions. [2022-03-15 15:58:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:49,408 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:49,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:49,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:49,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-03-15 15:58:49,625 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:49,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1027129935, now seen corresponding path program 344 times [2022-03-15 15:58:49,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:49,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215472572] [2022-03-15 15:58:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:49,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:49,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:49,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215472572] [2022-03-15 15:58:49,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215472572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:49,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820517150] [2022-03-15 15:58:49,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:58:49,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:49,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:49,755 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:49,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-03-15 15:58:50,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:58:50,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:50,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:50,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:50,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:50,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:58:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:50,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:50,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:50,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 176 [2022-03-15 15:58:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:51,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820517150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:51,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:51,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 24 [2022-03-15 15:58:51,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756399532] [2022-03-15 15:58:51,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:51,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:58:51,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:58:51,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:58:51,121 INFO L87 Difference]: Start difference. First operand 45 states and 68 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:51,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:51,304 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2022-03-15 15:58:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:58:51,304 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:51,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:51,304 INFO L225 Difference]: With dead ends: 77 [2022-03-15 15:58:51,304 INFO L226 Difference]: Without dead ends: 64 [2022-03-15 15:58:51,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:58:51,304 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:51,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 182 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 395 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-03-15 15:58:51,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-15 15:58:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2022-03-15 15:58:51,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 42 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) [2022-03-15 15:58:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 65 transitions. [2022-03-15 15:58:51,305 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 65 transitions. Word has length 18 [2022-03-15 15:58:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:51,305 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 65 transitions. [2022-03-15 15:58:51,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 65 transitions. [2022-03-15 15:58:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:51,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:51,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:51,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:51,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:51,518 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:51,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1917062633, now seen corresponding path program 345 times [2022-03-15 15:58:51,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:51,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807785174] [2022-03-15 15:58:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:51,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:51,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:51,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807785174] [2022-03-15 15:58:51,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807785174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:51,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478762554] [2022-03-15 15:58:51,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:58:51,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:51,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:51,787 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:51,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-03-15 15:58:52,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:58:52,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:52,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:52,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:52,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:52,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 134 [2022-03-15 15:58:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:52,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:53,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:53,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 203 [2022-03-15 15:58:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:53,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478762554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:53,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:53,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 15:58:53,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829614318] [2022-03-15 15:58:53,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:53,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 15:58:53,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:53,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 15:58:53,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:58:53,525 INFO L87 Difference]: Start difference. First operand 43 states and 65 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:54,226 INFO L93 Difference]: Finished difference Result 112 states and 161 transitions. [2022-03-15 15:58:54,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 15:58:54,227 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:58:54,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:54,227 INFO L225 Difference]: With dead ends: 112 [2022-03-15 15:58:54,227 INFO L226 Difference]: Without dead ends: 102 [2022-03-15 15:58:54,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:58:54,227 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 108 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:54,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 142 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 369 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-03-15 15:58:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-15 15:58:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 46. [2022-03-15 15:58:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 70 transitions. [2022-03-15 15:58:54,228 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 70 transitions. Word has length 18 [2022-03-15 15:58:54,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:54,228 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 70 transitions. [2022-03-15 15:58:54,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:54,228 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 70 transitions. [2022-03-15 15:58:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:54,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:54,228 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:54,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-03-15 15:58:54,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:54,429 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:54,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1073054253, now seen corresponding path program 346 times [2022-03-15 15:58:54,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:54,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964298956] [2022-03-15 15:58:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:54,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:54,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:54,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964298956] [2022-03-15 15:58:54,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964298956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:54,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923926825] [2022-03-15 15:58:54,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:58:54,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:54,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:54,677 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:54,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-03-15 15:58:54,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:58:54,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:54,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:54,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:55,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:58:55,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 128 [2022-03-15 15:58:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:55,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:56,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:56,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:58:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 15:58:56,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923926825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:56,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:56,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 25 [2022-03-15 15:58:56,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661983173] [2022-03-15 15:58:56,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:56,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:58:56,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:58:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:58:56,415 INFO L87 Difference]: Start difference. First operand 46 states and 70 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:58:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:56,635 INFO L93 Difference]: Finished difference Result 55 states and 81 transitions. [2022-03-15 15:58:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:58:56,635 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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 18 [2022-03-15 15:58:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:56,635 INFO L225 Difference]: With dead ends: 55 [2022-03-15 15:58:56,635 INFO L226 Difference]: Without dead ends: 45 [2022-03-15 15:58:56,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:58:56,636 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:56,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 79 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-03-15 15:58:56,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-15 15:58:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-15 15:58:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 44 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:58:56,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 68 transitions. [2022-03-15 15:58:56,636 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 68 transitions. Word has length 18 [2022-03-15 15:58:56,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:56,636 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 68 transitions. [2022-03-15 15:58:56,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 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) [2022-03-15 15:58:56,636 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 68 transitions. [2022-03-15 15:58:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:56,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:56,637 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:56,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-03-15 15:58:56,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2022-03-15 15:58:56,853 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:56,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:56,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1161053241, now seen corresponding path program 347 times [2022-03-15 15:58:56,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:56,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932887940] [2022-03-15 15:58:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:56,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:57,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:57,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932887940] [2022-03-15 15:58:57,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932887940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:57,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930717733] [2022-03-15 15:58:57,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:58:57,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:57,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:57,004 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:57,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-03-15 15:58:57,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:58:57,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:57,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:57,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:57,550 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 166 treesize of output 132 [2022-03-15 15:58:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:57,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:58:58,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:58:58,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 177 [2022-03-15 15:58:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:58,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930717733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:58:58,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:58:58,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:58:58,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596676123] [2022-03-15 15:58:58,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:58:58,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:58:58,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:58:58,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:58:58,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:58:58,471 INFO L87 Difference]: Start difference. First operand 45 states and 68 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:58:58,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:58:58,894 INFO L93 Difference]: Finished difference Result 60 states and 88 transitions. [2022-03-15 15:58:58,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:58:58,894 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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 18 [2022-03-15 15:58:58,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:58:58,894 INFO L225 Difference]: With dead ends: 60 [2022-03-15 15:58:58,894 INFO L226 Difference]: Without dead ends: 48 [2022-03-15 15:58:58,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 15:58:58,894 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:58:58,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 124 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:58:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-15 15:58:58,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-03-15 15:58:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 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) [2022-03-15 15:58:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 66 transitions. [2022-03-15 15:58:58,895 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 66 transitions. Word has length 18 [2022-03-15 15:58:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:58:58,895 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 66 transitions. [2022-03-15 15:58:58,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:58:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 66 transitions. [2022-03-15 15:58:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:58:58,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:58:58,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:58:58,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Ended with exit code 0 [2022-03-15 15:58:59,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:59,096 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:58:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:58:59,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1698908819, now seen corresponding path program 348 times [2022-03-15 15:58:59,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:58:59,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102029261] [2022-03-15 15:58:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:58:59,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:58:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:58:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:58:59,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:58:59,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102029261] [2022-03-15 15:58:59,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102029261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:58:59,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732256348] [2022-03-15 15:58:59,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:58:59,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:58:59,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:58:59,278 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:58:59,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-03-15 15:58:59,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:58:59,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:58:59,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:58:59,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:58:59,880 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 154 treesize of output 122 [2022-03-15 15:59:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:00,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:00,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:00,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:59:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:00,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732256348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:00,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:00,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:59:00,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75037496] [2022-03-15 15:59:00,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:00,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:59:00,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:59:00,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:00,847 INFO L87 Difference]: Start difference. First operand 44 states and 66 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:59:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:01,241 INFO L93 Difference]: Finished difference Result 57 states and 83 transitions. [2022-03-15 15:59:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:01,241 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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 18 [2022-03-15 15:59:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:01,242 INFO L225 Difference]: With dead ends: 57 [2022-03-15 15:59:01,242 INFO L226 Difference]: Without dead ends: 42 [2022-03-15 15:59:01,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:59:01,242 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:01,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 149 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-15 15:59:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-15 15:59:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 63 transitions. [2022-03-15 15:59:01,243 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 63 transitions. Word has length 18 [2022-03-15 15:59:01,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:01,243 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 63 transitions. [2022-03-15 15:59:01,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:59:01,243 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 63 transitions. [2022-03-15 15:59:01,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:01,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:01,243 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:01,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:01,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:01,443 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:01,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:01,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1492106383, now seen corresponding path program 349 times [2022-03-15 15:59:01,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:01,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909901266] [2022-03-15 15:59:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:01,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:01,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:01,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909901266] [2022-03-15 15:59:01,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909901266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:01,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639774785] [2022-03-15 15:59:01,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:01,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:01,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:01,773 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:01,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-03-15 15:59:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:02,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:02,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:02,421 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 142 treesize of output 114 [2022-03-15 15:59:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:02,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:03,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:03,391 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 241 treesize of output 203 [2022-03-15 15:59:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:03,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639774785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:03,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:03,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:59:03,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545313523] [2022-03-15 15:59:03,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:03,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:59:03,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:59:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:03,542 INFO L87 Difference]: Start difference. First operand 42 states and 63 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:03,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:03,968 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2022-03-15 15:59:03,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:03,968 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:03,968 INFO L225 Difference]: With dead ends: 73 [2022-03-15 15:59:03,968 INFO L226 Difference]: Without dead ends: 63 [2022-03-15 15:59:03,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:03,968 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:03,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 150 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:03,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-15 15:59:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2022-03-15 15:59:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 45 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 70 transitions. [2022-03-15 15:59:03,969 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 70 transitions. Word has length 18 [2022-03-15 15:59:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:03,969 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 70 transitions. [2022-03-15 15:59:03,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 70 transitions. [2022-03-15 15:59:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:03,969 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:03,969 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:03,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-03-15 15:59:04,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:04,170 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:04,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1958852533, now seen corresponding path program 350 times [2022-03-15 15:59:04,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:04,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612967899] [2022-03-15 15:59:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:04,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:04,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:04,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612967899] [2022-03-15 15:59:04,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612967899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:04,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416785032] [2022-03-15 15:59:04,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:04,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:04,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:04,353 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:04,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-03-15 15:59:04,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:04,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:04,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:04,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:04,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:04,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 125 [2022-03-15 15:59:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:05,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:05,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:05,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 206 [2022-03-15 15:59:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:05,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416785032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:05,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:05,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:59:05,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302562447] [2022-03-15 15:59:05,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:05,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:59:05,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:05,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:59:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:59:05,918 INFO L87 Difference]: Start difference. First operand 46 states and 70 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:59:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:06,093 INFO L93 Difference]: Finished difference Result 55 states and 81 transitions. [2022-03-15 15:59:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:06,093 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:59:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:06,093 INFO L225 Difference]: With dead ends: 55 [2022-03-15 15:59:06,093 INFO L226 Difference]: Without dead ends: 45 [2022-03-15 15:59:06,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:59:06,093 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:06,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 91 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 243 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-03-15 15:59:06,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-15 15:59:06,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-15 15:59:06,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 44 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:06,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 68 transitions. [2022-03-15 15:59:06,094 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 68 transitions. Word has length 18 [2022-03-15 15:59:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:06,094 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 68 transitions. [2022-03-15 15:59:06,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:59:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 68 transitions. [2022-03-15 15:59:06,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:06,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:06,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:06,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:06,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:06,311 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:06,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:06,311 INFO L85 PathProgramCache]: Analyzing trace with hash 275254961, now seen corresponding path program 351 times [2022-03-15 15:59:06,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:06,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953992726] [2022-03-15 15:59:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:06,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:06,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:06,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953992726] [2022-03-15 15:59:06,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953992726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:06,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596902515] [2022-03-15 15:59:06,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:06,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:06,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:06,653 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:06,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-03-15 15:59:06,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:06,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:06,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:06,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:07,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:07,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 134 [2022-03-15 15:59:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:07,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:08,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:08,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 176 [2022-03-15 15:59:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:08,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596902515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:08,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:08,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:59:08,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660207615] [2022-03-15 15:59:08,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:08,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:59:08,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:08,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:59:08,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:08,848 INFO L87 Difference]: Start difference. First operand 45 states and 68 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:59:09,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:09,327 INFO L93 Difference]: Finished difference Result 56 states and 82 transitions. [2022-03-15 15:59:09,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:09,327 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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 18 [2022-03-15 15:59:09,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:09,328 INFO L225 Difference]: With dead ends: 56 [2022-03-15 15:59:09,328 INFO L226 Difference]: Without dead ends: 44 [2022-03-15 15:59:09,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 15:59:09,328 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:09,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 125 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-03-15 15:59:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-15 15:59:09,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-15 15:59:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 43 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) [2022-03-15 15:59:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 66 transitions. [2022-03-15 15:59:09,329 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 66 transitions. Word has length 18 [2022-03-15 15:59:09,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:09,329 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 66 transitions. [2022-03-15 15:59:09,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 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) [2022-03-15 15:59:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 66 transitions. [2022-03-15 15:59:09,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:09,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:09,329 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:09,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:09,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-03-15 15:59:09,530 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash 813110539, now seen corresponding path program 352 times [2022-03-15 15:59:09,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:09,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453575475] [2022-03-15 15:59:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:09,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:09,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:09,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453575475] [2022-03-15 15:59:09,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453575475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:09,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124890748] [2022-03-15 15:59:09,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:09,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:09,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:09,881 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:09,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-03-15 15:59:10,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:10,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:10,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:10,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:10,429 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 154 treesize of output 124 [2022-03-15 15:59:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:10,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:11,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:11,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:59:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:11,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124890748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:11,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:11,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:59:11,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004172877] [2022-03-15 15:59:11,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:11,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:59:11,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:11,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:59:11,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:11,184 INFO L87 Difference]: Start difference. First operand 44 states and 66 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:11,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:11,414 INFO L93 Difference]: Finished difference Result 61 states and 89 transitions. [2022-03-15 15:59:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:11,414 INFO L225 Difference]: With dead ends: 61 [2022-03-15 15:59:11,414 INFO L226 Difference]: Without dead ends: 47 [2022-03-15 15:59:11,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:11,417 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:11,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 169 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-15 15:59:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-03-15 15:59:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 42 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 64 transitions. [2022-03-15 15:59:11,418 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 64 transitions. Word has length 18 [2022-03-15 15:59:11,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:11,419 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 64 transitions. [2022-03-15 15:59:11,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 64 transitions. [2022-03-15 15:59:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:11,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:11,419 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:11,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:11,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-03-15 15:59:11,634 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:11,634 INFO L85 PathProgramCache]: Analyzing trace with hash 306764273, now seen corresponding path program 353 times [2022-03-15 15:59:11,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:11,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144413846] [2022-03-15 15:59:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:11,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:11,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:11,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144413846] [2022-03-15 15:59:11,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144413846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:11,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493059984] [2022-03-15 15:59:11,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:11,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:11,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:11,793 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:11,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-03-15 15:59:12,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:12,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:12,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:12,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:12,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:12,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 120 [2022-03-15 15:59:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:12,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:13,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:13,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 193 [2022-03-15 15:59:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:13,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493059984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:13,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:13,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:59:13,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519743100] [2022-03-15 15:59:13,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:13,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:59:13,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:13,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:59:13,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:59:13,674 INFO L87 Difference]: Start difference. First operand 43 states and 64 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:59:13,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:13,796 INFO L93 Difference]: Finished difference Result 58 states and 84 transitions. [2022-03-15 15:59:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:59:13,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:13,809 INFO L225 Difference]: With dead ends: 58 [2022-03-15 15:59:13,809 INFO L226 Difference]: Without dead ends: 40 [2022-03-15 15:59:13,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:13,809 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:13,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 159 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-03-15 15:59:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-15 15:59:13,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-15 15:59:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 39 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 60 transitions. [2022-03-15 15:59:13,810 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 60 transitions. Word has length 18 [2022-03-15 15:59:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:13,810 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 60 transitions. [2022-03-15 15:59:13,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:59:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 60 transitions. [2022-03-15 15:59:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:13,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:13,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:13,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Ended with exit code 0 [2022-03-15 15:59:14,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-03-15 15:59:14,011 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash -931506617, now seen corresponding path program 354 times [2022-03-15 15:59:14,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:14,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443263927] [2022-03-15 15:59:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:14,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:14,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:14,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443263927] [2022-03-15 15:59:14,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443263927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:14,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735851732] [2022-03-15 15:59:14,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:14,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:14,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:14,177 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:14,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-03-15 15:59:14,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:59:14,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:14,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:14,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:14,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:14,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 15:59:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:14,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:15,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:15,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 203 [2022-03-15 15:59:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:15,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735851732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:15,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:15,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 15:59:15,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130393140] [2022-03-15 15:59:15,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:15,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:59:15,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:59:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:59:15,459 INFO L87 Difference]: Start difference. First operand 40 states and 60 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:15,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:15,697 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2022-03-15 15:59:15,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:15,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:15,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:15,698 INFO L225 Difference]: With dead ends: 71 [2022-03-15 15:59:15,698 INFO L226 Difference]: Without dead ends: 58 [2022-03-15 15:59:15,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:15,698 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:15,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 162 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:15,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-15 15:59:15,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2022-03-15 15:59:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5) internal successors, (54), 36 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) [2022-03-15 15:59:15,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 54 transitions. [2022-03-15 15:59:15,699 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 54 transitions. Word has length 18 [2022-03-15 15:59:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:15,699 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 54 transitions. [2022-03-15 15:59:15,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 54 transitions. [2022-03-15 15:59:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:15,699 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:15,699 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:15,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:15,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-03-15 15:59:15,906 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:15,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:15,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1062958539, now seen corresponding path program 355 times [2022-03-15 15:59:15,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:15,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352636867] [2022-03-15 15:59:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:15,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:16,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:16,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352636867] [2022-03-15 15:59:16,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352636867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:16,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294215362] [2022-03-15 15:59:16,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:16,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:16,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:16,100 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:16,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-03-15 15:59:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:16,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:16,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:16,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 144 [2022-03-15 15:59:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:16,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:17,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:17,332 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 223 treesize of output 191 [2022-03-15 15:59:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:17,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294215362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:17,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:17,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-03-15 15:59:17,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053177367] [2022-03-15 15:59:17,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:17,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:17,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:17,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:17,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:17,455 INFO L87 Difference]: Start difference. First operand 37 states and 54 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:17,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:17,656 INFO L93 Difference]: Finished difference Result 80 states and 112 transitions. [2022-03-15 15:59:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:17,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:17,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:17,656 INFO L225 Difference]: With dead ends: 80 [2022-03-15 15:59:17,656 INFO L226 Difference]: Without dead ends: 70 [2022-03-15 15:59:17,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:17,656 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:17,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 175 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-15 15:59:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2022-03-15 15:59:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 37 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) [2022-03-15 15:59:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2022-03-15 15:59:17,657 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 18 [2022-03-15 15:59:17,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:17,657 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2022-03-15 15:59:17,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2022-03-15 15:59:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:17,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:17,657 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:17,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:17,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:17,874 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1906966919, now seen corresponding path program 356 times [2022-03-15 15:59:17,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:17,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407886642] [2022-03-15 15:59:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:17,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:18,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:18,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407886642] [2022-03-15 15:59:18,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407886642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:18,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456207404] [2022-03-15 15:59:18,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:18,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:18,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:18,005 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:18,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-03-15 15:59:18,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:18,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:18,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:18,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:18,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 147 [2022-03-15 15:59:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:18,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:19,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:19,547 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 192 treesize of output 172 [2022-03-15 15:59:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:19,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456207404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:19,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:19,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 15:59:19,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499410754] [2022-03-15 15:59:19,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:19,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:59:19,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:19,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:59:19,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:59:19,740 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:19,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:19,999 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2022-03-15 15:59:20,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:20,000 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:20,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:20,000 INFO L225 Difference]: With dead ends: 68 [2022-03-15 15:59:20,000 INFO L226 Difference]: Without dead ends: 57 [2022-03-15 15:59:20,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:20,000 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:20,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 154 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:59:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-15 15:59:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2022-03-15 15:59:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 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) [2022-03-15 15:59:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2022-03-15 15:59:20,001 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 18 [2022-03-15 15:59:20,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:20,001 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2022-03-15 15:59:20,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2022-03-15 15:59:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:20,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:20,001 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:20,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:20,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2022-03-15 15:59:20,202 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:20,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:20,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1083212221, now seen corresponding path program 357 times [2022-03-15 15:59:20,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:20,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222232774] [2022-03-15 15:59:20,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:20,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:20,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:20,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222232774] [2022-03-15 15:59:20,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222232774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:20,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183825355] [2022-03-15 15:59:20,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:20,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:20,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:20,379 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:20,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-03-15 15:59:20,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:59:20,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:20,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:20,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:20,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:20,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 126 [2022-03-15 15:59:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:21,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:22,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:22,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 172 [2022-03-15 15:59:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:22,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183825355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:22,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:22,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-03-15 15:59:22,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244159249] [2022-03-15 15:59:22,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:22,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 15:59:22,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:22,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 15:59:22,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:22,250 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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) [2022-03-15 15:59:22,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:22,640 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2022-03-15 15:59:22,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:59:22,641 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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 18 [2022-03-15 15:59:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:22,641 INFO L225 Difference]: With dead ends: 61 [2022-03-15 15:59:22,641 INFO L226 Difference]: Without dead ends: 51 [2022-03-15 15:59:22,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:59:22,641 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 136 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:22,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 110 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 299 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2022-03-15 15:59:22,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-15 15:59:22,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2022-03-15 15:59:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 37 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) [2022-03-15 15:59:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2022-03-15 15:59:22,642 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 18 [2022-03-15 15:59:22,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:22,642 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2022-03-15 15:59:22,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 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) [2022-03-15 15:59:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2022-03-15 15:59:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:22,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:22,642 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:22,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-03-15 15:59:22,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:22,859 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:22,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash -239203841, now seen corresponding path program 358 times [2022-03-15 15:59:22,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:22,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502091650] [2022-03-15 15:59:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:22,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:22,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:22,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502091650] [2022-03-15 15:59:22,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502091650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:22,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598564571] [2022-03-15 15:59:22,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:22,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:22,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:23,000 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:23,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-03-15 15:59:23,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:23,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:23,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:23,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:23,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:23,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 126 [2022-03-15 15:59:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:23,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:24,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:24,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 204 [2022-03-15 15:59:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:24,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598564571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:24,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:24,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-03-15 15:59:24,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666035079] [2022-03-15 15:59:24,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:24,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:59:24,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:24,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:59:24,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:59:24,760 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:25,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:25,011 INFO L93 Difference]: Finished difference Result 68 states and 96 transitions. [2022-03-15 15:59:25,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:25,012 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:25,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:25,012 INFO L225 Difference]: With dead ends: 68 [2022-03-15 15:59:25,012 INFO L226 Difference]: Without dead ends: 58 [2022-03-15 15:59:25,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:59:25,012 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:25,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 128 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 263 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-03-15 15:59:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-15 15:59:25,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2022-03-15 15:59:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 53 transitions. [2022-03-15 15:59:25,013 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 53 transitions. Word has length 18 [2022-03-15 15:59:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:25,013 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 53 transitions. [2022-03-15 15:59:25,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 53 transitions. [2022-03-15 15:59:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:25,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:25,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:25,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-03-15 15:59:25,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:25,214 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:25,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:25,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1994903653, now seen corresponding path program 359 times [2022-03-15 15:59:25,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:25,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260878545] [2022-03-15 15:59:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:25,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:25,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:25,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260878545] [2022-03-15 15:59:25,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260878545] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:25,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371528940] [2022-03-15 15:59:25,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:25,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:25,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:25,438 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:25,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-03-15 15:59:25,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:59:25,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:25,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:25,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:25,903 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 168 treesize of output 134 [2022-03-15 15:59:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:26,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:26,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:26,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 203 [2022-03-15 15:59:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:26,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371528940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:26,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:26,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:59:26,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745760045] [2022-03-15 15:59:26,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:26,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:59:26,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:59:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:59:26,816 INFO L87 Difference]: Start difference. First operand 37 states and 53 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:59:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:27,102 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2022-03-15 15:59:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:59:27,102 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:59:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:27,103 INFO L225 Difference]: With dead ends: 69 [2022-03-15 15:59:27,103 INFO L226 Difference]: Without dead ends: 56 [2022-03-15 15:59:27,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:27,103 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:27,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 119 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-15 15:59:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2022-03-15 15:59:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2022-03-15 15:59:27,104 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 50 transitions. Word has length 18 [2022-03-15 15:59:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:27,104 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 50 transitions. [2022-03-15 15:59:27,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:59:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2022-03-15 15:59:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:27,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:27,104 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:27,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Ended with exit code 0 [2022-03-15 15:59:27,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:27,304 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:27,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:27,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1104970955, now seen corresponding path program 360 times [2022-03-15 15:59:27,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:27,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532582609] [2022-03-15 15:59:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:27,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:27,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:27,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532582609] [2022-03-15 15:59:27,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532582609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:27,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885338863] [2022-03-15 15:59:27,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:27,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:27,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:27,554 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:27,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-03-15 15:59:27,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:27,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:27,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:27,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:28,132 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 186 treesize of output 146 [2022-03-15 15:59:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:28,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:29,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:29,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 186 [2022-03-15 15:59:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:29,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885338863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:29,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:29,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:59:29,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456430711] [2022-03-15 15:59:29,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:29,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:59:29,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:29,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:59:29,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:29,308 INFO L87 Difference]: Start difference. First operand 35 states and 50 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:29,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:29,577 INFO L93 Difference]: Finished difference Result 63 states and 88 transitions. [2022-03-15 15:59:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:29,577 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:29,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:29,578 INFO L225 Difference]: With dead ends: 63 [2022-03-15 15:59:29,578 INFO L226 Difference]: Without dead ends: 53 [2022-03-15 15:59:29,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-15 15:59:29,578 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:29,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 119 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-15 15:59:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2022-03-15 15:59:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 37 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) [2022-03-15 15:59:29,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2022-03-15 15:59:29,579 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 18 [2022-03-15 15:59:29,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:29,579 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2022-03-15 15:59:29,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2022-03-15 15:59:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:29,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:29,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:29,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:29,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:29,793 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:29,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1948979335, now seen corresponding path program 361 times [2022-03-15 15:59:29,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:29,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185360061] [2022-03-15 15:59:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:29,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:30,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:30,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185360061] [2022-03-15 15:59:30,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185360061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:30,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500410004] [2022-03-15 15:59:30,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:30,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:30,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:30,019 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:30,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-03-15 15:59:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:30,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:30,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:30,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:30,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 125 [2022-03-15 15:59:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:30,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:31,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:31,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 210 [2022-03-15 15:59:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:31,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500410004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:31,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:31,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:59:31,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292211393] [2022-03-15 15:59:31,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:31,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:59:31,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:31,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:59:31,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:31,751 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:31,943 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2022-03-15 15:59:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:31,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:31,944 INFO L225 Difference]: With dead ends: 47 [2022-03-15 15:59:31,944 INFO L226 Difference]: Without dead ends: 37 [2022-03-15 15:59:31,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:31,944 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:31,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 71 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 196 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-03-15 15:59:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-15 15:59:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-15 15:59:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 53 transitions. [2022-03-15 15:59:31,945 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 53 transitions. Word has length 18 [2022-03-15 15:59:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:31,945 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 53 transitions. [2022-03-15 15:59:31,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 53 transitions. [2022-03-15 15:59:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:31,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:31,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:31,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:32,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:32,151 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash -111880467, now seen corresponding path program 362 times [2022-03-15 15:59:32,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:32,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047324345] [2022-03-15 15:59:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:32,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:32,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:32,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047324345] [2022-03-15 15:59:32,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047324345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:32,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358926622] [2022-03-15 15:59:32,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:32,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:32,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:32,395 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:32,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-03-15 15:59:32,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:32,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:32,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:33,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:59:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:33,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:33,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:33,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 193 [2022-03-15 15:59:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:33,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358926622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:33,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:33,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:59:33,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693987503] [2022-03-15 15:59:33,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:33,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:59:33,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:33,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:59:33,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:33,947 INFO L87 Difference]: Start difference. First operand 37 states and 53 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:34,080 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2022-03-15 15:59:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:34,081 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:34,081 INFO L225 Difference]: With dead ends: 48 [2022-03-15 15:59:34,081 INFO L226 Difference]: Without dead ends: 36 [2022-03-15 15:59:34,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:34,081 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:34,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 265 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-03-15 15:59:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-15 15:59:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-15 15:59:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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) [2022-03-15 15:59:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2022-03-15 15:59:34,082 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 51 transitions. Word has length 18 [2022-03-15 15:59:34,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:34,082 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 51 transitions. [2022-03-15 15:59:34,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:34,082 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 51 transitions. [2022-03-15 15:59:34,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:34,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:34,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:34,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Ended with exit code 0 [2022-03-15 15:59:34,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-03-15 15:59:34,292 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash 425975111, now seen corresponding path program 363 times [2022-03-15 15:59:34,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:34,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775860251] [2022-03-15 15:59:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:34,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:34,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775860251] [2022-03-15 15:59:34,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775860251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:34,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832582656] [2022-03-15 15:59:34,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:34,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:34,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:34,578 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:34,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-03-15 15:59:34,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:59:34,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:34,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:34,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:35,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:35,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 120 [2022-03-15 15:59:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:35,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:36,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:36,208 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 223 treesize of output 191 [2022-03-15 15:59:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:36,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832582656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:36,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:36,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:59:36,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261759960] [2022-03-15 15:59:36,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:36,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:59:36,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:59:36,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:36,496 INFO L87 Difference]: Start difference. First operand 36 states and 51 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:59:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:36,691 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2022-03-15 15:59:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:36,691 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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 18 [2022-03-15 15:59:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:36,691 INFO L225 Difference]: With dead ends: 49 [2022-03-15 15:59:36,691 INFO L226 Difference]: Without dead ends: 34 [2022-03-15 15:59:36,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:36,691 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:36,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 141 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-03-15 15:59:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-15 15:59:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-15 15:59:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2022-03-15 15:59:36,692 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 18 [2022-03-15 15:59:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:36,692 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2022-03-15 15:59:36,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 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) [2022-03-15 15:59:36,692 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2022-03-15 15:59:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:36,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:36,692 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:36,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-03-15 15:59:36,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:36,900 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:36,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:36,901 INFO L85 PathProgramCache]: Analyzing trace with hash 219172675, now seen corresponding path program 364 times [2022-03-15 15:59:36,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:36,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944472881] [2022-03-15 15:59:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:36,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:37,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:37,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944472881] [2022-03-15 15:59:37,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944472881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:37,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819160477] [2022-03-15 15:59:37,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:37,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:37,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:37,161 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:37,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-03-15 15:59:37,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:37,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:37,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:37,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:37,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:37,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 125 [2022-03-15 15:59:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:38,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:38,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:38,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 175 [2022-03-15 15:59:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:39,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819160477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:39,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:39,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 15:59:39,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090995050] [2022-03-15 15:59:39,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:39,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 15:59:39,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 15:59:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:39,032 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:39,227 INFO L93 Difference]: Finished difference Result 59 states and 82 transitions. [2022-03-15 15:59:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:39,228 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:39,228 INFO L225 Difference]: With dead ends: 59 [2022-03-15 15:59:39,228 INFO L226 Difference]: Without dead ends: 49 [2022-03-15 15:59:39,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:39,228 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:39,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 91 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 223 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-03-15 15:59:39,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-15 15:59:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2022-03-15 15:59:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 37 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) [2022-03-15 15:59:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2022-03-15 15:59:39,229 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 18 [2022-03-15 15:59:39,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:39,229 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2022-03-15 15:59:39,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:39,229 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2022-03-15 15:59:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:39,229 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:39,229 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:39,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:39,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-03-15 15:59:39,430 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:39,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:39,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1063181055, now seen corresponding path program 365 times [2022-03-15 15:59:39,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:39,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351121764] [2022-03-15 15:59:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:39,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:39,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:39,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351121764] [2022-03-15 15:59:39,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351121764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:39,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790877677] [2022-03-15 15:59:39,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:39,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:39,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:39,695 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:39,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-03-15 15:59:39,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:39,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:39,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:39,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:40,302 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 146 treesize of output 116 [2022-03-15 15:59:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:40,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:41,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:41,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 236 treesize of output 202 [2022-03-15 15:59:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:41,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790877677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:41,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:41,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:59:41,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515651927] [2022-03-15 15:59:41,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:41,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:59:41,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:41,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:59:41,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:41,404 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:41,603 INFO L93 Difference]: Finished difference Result 64 states and 88 transitions. [2022-03-15 15:59:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:41,603 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:41,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:41,603 INFO L225 Difference]: With dead ends: 64 [2022-03-15 15:59:41,603 INFO L226 Difference]: Without dead ends: 54 [2022-03-15 15:59:41,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:41,603 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:41,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 173 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-15 15:59:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2022-03-15 15:59:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 53 transitions. [2022-03-15 15:59:41,604 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 53 transitions. Word has length 18 [2022-03-15 15:59:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:41,604 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 53 transitions. [2022-03-15 15:59:41,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 53 transitions. [2022-03-15 15:59:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:41,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:41,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:41,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:41,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-03-15 15:59:41,812 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash -997678747, now seen corresponding path program 366 times [2022-03-15 15:59:41,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:41,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491019477] [2022-03-15 15:59:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:41,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:42,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:42,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491019477] [2022-03-15 15:59:42,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491019477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:42,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212652979] [2022-03-15 15:59:42,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:42,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:42,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:42,111 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:42,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-03-15 15:59:42,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:42,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:42,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:42,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:42,708 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 144 treesize of output 116 [2022-03-15 15:59:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:42,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:43,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:43,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:59:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:43,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212652979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:43,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:43,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 15:59:43,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791859007] [2022-03-15 15:59:43,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:43,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 15:59:43,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:43,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 15:59:43,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:43,649 INFO L87 Difference]: Start difference. First operand 37 states and 53 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:43,837 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2022-03-15 15:59:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:43,837 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:43,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:43,837 INFO L225 Difference]: With dead ends: 54 [2022-03-15 15:59:43,837 INFO L226 Difference]: Without dead ends: 42 [2022-03-15 15:59:43,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:43,838 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:43,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 146 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-15 15:59:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-03-15 15:59:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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) [2022-03-15 15:59:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2022-03-15 15:59:43,838 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 51 transitions. Word has length 18 [2022-03-15 15:59:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:43,838 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 51 transitions. [2022-03-15 15:59:43,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 51 transitions. [2022-03-15 15:59:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:43,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:43,839 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:43,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-03-15 15:59:44,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2022-03-15 15:59:44,047 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:44,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash -459823169, now seen corresponding path program 367 times [2022-03-15 15:59:44,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:44,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145048536] [2022-03-15 15:59:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:44,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:44,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:44,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145048536] [2022-03-15 15:59:44,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145048536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:44,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157763872] [2022-03-15 15:59:44,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:44,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:44,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:44,316 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:44,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-03-15 15:59:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:44,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:44,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:44,839 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 142 treesize of output 114 [2022-03-15 15:59:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:44,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:45,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:45,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 221 [2022-03-15 15:59:45,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:45,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157763872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:45,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:45,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:59:45,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064680230] [2022-03-15 15:59:45,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:45,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:59:45,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:45,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:59:45,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:45,731 INFO L87 Difference]: Start difference. First operand 36 states and 51 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:45,903 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2022-03-15 15:59:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:45,903 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:45,904 INFO L225 Difference]: With dead ends: 53 [2022-03-15 15:59:45,904 INFO L226 Difference]: Without dead ends: 39 [2022-03-15 15:59:45,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:59:45,904 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:45,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 128 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-15 15:59:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2022-03-15 15:59:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2022-03-15 15:59:45,905 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 18 [2022-03-15 15:59:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:45,905 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2022-03-15 15:59:45,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:45,905 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2022-03-15 15:59:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:45,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:45,905 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:45,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:46,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:46,110 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:46,110 INFO L85 PathProgramCache]: Analyzing trace with hash -966169435, now seen corresponding path program 368 times [2022-03-15 15:59:46,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:46,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974308642] [2022-03-15 15:59:46,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:46,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:46,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:46,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974308642] [2022-03-15 15:59:46,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974308642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:46,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480919808] [2022-03-15 15:59:46,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:59:46,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:46,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:46,398 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:46,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-03-15 15:59:46,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:59:46,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:46,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:46,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:46,952 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 168 treesize of output 134 [2022-03-15 15:59:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:47,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:47,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:47,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 178 [2022-03-15 15:59:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:47,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480919808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:47,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:47,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-03-15 15:59:47,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931667309] [2022-03-15 15:59:47,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:47,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:59:47,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:47,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:59:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:59:47,717 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 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) [2022-03-15 15:59:47,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:47,878 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-03-15 15:59:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:47,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 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 18 [2022-03-15 15:59:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:47,878 INFO L225 Difference]: With dead ends: 50 [2022-03-15 15:59:47,878 INFO L226 Difference]: Without dead ends: 33 [2022-03-15 15:59:47,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:59:47,878 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:47,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 144 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:47,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-15 15:59:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-15 15:59:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 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) [2022-03-15 15:59:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2022-03-15 15:59:47,879 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 18 [2022-03-15 15:59:47,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:47,879 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2022-03-15 15:59:47,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 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) [2022-03-15 15:59:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2022-03-15 15:59:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:47,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:47,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:47,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:48,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:48,083 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1979225615, now seen corresponding path program 369 times [2022-03-15 15:59:48,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:48,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789338931] [2022-03-15 15:59:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:48,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:48,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789338931] [2022-03-15 15:59:48,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789338931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:48,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180714092] [2022-03-15 15:59:48,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:59:48,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:48,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:48,248 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:48,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-03-15 15:59:48,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:59:48,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:48,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:48,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:49,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:49,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 126 [2022-03-15 15:59:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:49,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:50,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:50,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 180 [2022-03-15 15:59:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:50,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180714092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:50,583 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:50,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:59:50,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712167689] [2022-03-15 15:59:50,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:50,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:59:50,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:50,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:59:50,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:59:50,591 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:59:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:50,730 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-03-15 15:59:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:59:50,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:50,731 INFO L225 Difference]: With dead ends: 51 [2022-03-15 15:59:50,731 INFO L226 Difference]: Without dead ends: 41 [2022-03-15 15:59:50,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:59:50,731 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:50,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 97 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-03-15 15:59:50,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-15 15:59:50,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-03-15 15:59:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2022-03-15 15:59:50,732 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 18 [2022-03-15 15:59:50,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:50,732 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2022-03-15 15:59:50,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:59:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2022-03-15 15:59:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:50,734 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:50,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:50,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:50,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:50,939 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:50,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1471733301, now seen corresponding path program 370 times [2022-03-15 15:59:50,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:50,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981482781] [2022-03-15 15:59:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:50,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:51,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:51,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981482781] [2022-03-15 15:59:51,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981482781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:51,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699768157] [2022-03-15 15:59:51,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:59:51,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:51,166 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:51,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-03-15 15:59:51,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:59:51,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:51,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:51,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:51,725 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 138 treesize of output 110 [2022-03-15 15:59:51,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:51,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:52,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:52,975 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 202 treesize of output 176 [2022-03-15 15:59:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:53,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699768157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:53,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:53,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-03-15 15:59:53,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309958561] [2022-03-15 15:59:53,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:53,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:59:53,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:53,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:59:53,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:59:53,113 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:53,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:53,335 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-03-15 15:59:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:53,336 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:53,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:53,338 INFO L225 Difference]: With dead ends: 39 [2022-03-15 15:59:53,338 INFO L226 Difference]: Without dead ends: 29 [2022-03-15 15:59:53,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:53,339 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:53,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 78 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:53,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-15 15:59:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-15 15:59:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-03-15 15:59:53,346 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 18 [2022-03-15 15:59:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:53,346 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-03-15 15:59:53,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-03-15 15:59:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:53,347 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:53,347 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:53,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Ended with exit code 0 [2022-03-15 15:59:53,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:53,566 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:53,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:53,566 INFO L85 PathProgramCache]: Analyzing trace with hash 762374193, now seen corresponding path program 371 times [2022-03-15 15:59:53,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:53,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667983798] [2022-03-15 15:59:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:53,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:53,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:53,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667983798] [2022-03-15 15:59:53,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667983798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:53,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311124468] [2022-03-15 15:59:53,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:59:53,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:53,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:53,835 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:53,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-03-15 15:59:54,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:59:54,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:54,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:54,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:54,538 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 162 treesize of output 128 [2022-03-15 15:59:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:54,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:55,568 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 15:59:55,569 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 205 treesize of output 168 [2022-03-15 15:59:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:55,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311124468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:55,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:55,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 15:59:55,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80680548] [2022-03-15 15:59:55,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:55,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:59:55,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:59:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:55,586 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:55,922 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-03-15 15:59:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 15:59:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:55,922 INFO L225 Difference]: With dead ends: 40 [2022-03-15 15:59:55,922 INFO L226 Difference]: Without dead ends: 28 [2022-03-15 15:59:55,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:59:55,923 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:55,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 122 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:59:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-15 15:59:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-15 15:59:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-03-15 15:59:55,923 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 18 [2022-03-15 15:59:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:55,923 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-03-15 15:59:55,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-03-15 15:59:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:55,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:55,924 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:55,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:56,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:56,124 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:56,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1300229771, now seen corresponding path program 372 times [2022-03-15 15:59:56,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:56,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459834122] [2022-03-15 15:59:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:56,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:56,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:56,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459834122] [2022-03-15 15:59:56,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459834122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:56,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438860381] [2022-03-15 15:59:56,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:59:56,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:56,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:56,294 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:56,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-03-15 15:59:56,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:59:56,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:59:56,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:56,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:56,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:56,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 114 [2022-03-15 15:59:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:57,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:59:57,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 15:59:57,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 204 [2022-03-15 15:59:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:57,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438860381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:59:57,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:59:57,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 15:59:57,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292416913] [2022-03-15 15:59:57,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:59:57,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:59:57,906 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:59:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:59:57,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:59:57,907 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:59:57,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:59:57,992 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-03-15 15:59:57,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:59:57,993 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 15:59:57,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:59:57,993 INFO L225 Difference]: With dead ends: 41 [2022-03-15 15:59:57,993 INFO L226 Difference]: Without dead ends: 27 [2022-03-15 15:59:57,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:59:57,993 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:59:57,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 114 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-03-15 15:59:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-15 15:59:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-15 15:59:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:59:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-03-15 15:59:57,994 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 18 [2022-03-15 15:59:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:59:57,994 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-03-15 15:59:57,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 15:59:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-03-15 15:59:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 15:59:57,994 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:59:57,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:59:58,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Forceful destruction successful, exit code 0 [2022-03-15 15:59:58,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:58,194 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:59:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:59:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash 793883505, now seen corresponding path program 373 times [2022-03-15 15:59:58,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:59:58,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991528319] [2022-03-15 15:59:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:59:58,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:59:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:58,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:59:58,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991528319] [2022-03-15 15:59:58,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991528319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:59:58,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406774637] [2022-03-15 15:59:58,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:59:58,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:59:58,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:59:58,471 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:59:58,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-03-15 15:59:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:59:58,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 15:59:58,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:59:59,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 15:59:59,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 15:59:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:59:59,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:00,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:00,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 204 [2022-03-15 16:00:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:00,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406774637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:00,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:00,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-03-15 16:00:00,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436726056] [2022-03-15 16:00:00,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:00,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 16:00:00,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:00,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 16:00:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:00:00,659 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:00,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:00,750 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-03-15 16:00:00,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:00,750 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:00:00,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:00,750 INFO L225 Difference]: With dead ends: 42 [2022-03-15 16:00:00,750 INFO L226 Difference]: Without dead ends: 26 [2022-03-15 16:00:00,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:00,751 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:00,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 117 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-03-15 16:00:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-15 16:00:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-15 16:00:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-03-15 16:00:00,751 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 18 [2022-03-15 16:00:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:00,751 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-03-15 16:00:00,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-03-15 16:00:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:00:00,752 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:00:00,752 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:00:00,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:00,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-03-15 16:00:00,961 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 16:00:00,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:00:00,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1834119303, now seen corresponding path program 374 times [2022-03-15 16:00:00,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:00:00,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194591413] [2022-03-15 16:00:00,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:00:00,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:00:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:00:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:01,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:00:01,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194591413] [2022-03-15 16:00:01,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194591413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:00:01,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554927790] [2022-03-15 16:00:01,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:00:01,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:00:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:00:01,170 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:00:01,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-03-15 16:00:01,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:00:01,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:00:01,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 16:00:01,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:00:01,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:00:01,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 132 [2022-03-15 16:00:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:02,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:00:02,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:00:02,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 203 [2022-03-15 16:00:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:00:02,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554927790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:00:02,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:00:02,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-03-15 16:00:02,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560783171] [2022-03-15 16:00:02,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:00:02,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 16:00:02,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:00:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 16:00:02,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:00:02,898 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 16:00:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:00:02,966 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-03-15 16:00:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:00:02,966 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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 18 [2022-03-15 16:00:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:00:02,966 INFO L225 Difference]: With dead ends: 24 [2022-03-15 16:00:02,966 INFO L226 Difference]: Without dead ends: 0 [2022-03-15 16:00:02,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:00:02,966 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:00:02,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 110 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2022-03-15 16:00:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-15 16:00:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-15 16:00:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:00:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-15 16:00:02,967 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2022-03-15 16:00:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:00:02,967 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-15 16:00:02,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 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) [2022-03-15 16:00:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-15 16:00:02,967 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-15 16:00:02,977 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 16:00:02,978 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 16:00:02,978 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 16:00:02,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Forceful destruction successful, exit code 0 [2022-03-15 16:00:03,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2022-03-15 16:00:03,194 INFO L732 BasicCegarLoop]: Path program histogram: [374, 6, 5, 3] [2022-03-15 16:00:03,203 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:00:03,204 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:00:03,205 INFO L202 PluginConnector]: Adding new model name-comparator-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:00:03 BasicIcfg [2022-03-15 16:00:03,205 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:00:03,205 INFO L158 Benchmark]: Toolchain (without parser) took 668491.47ms. Allocated memory was 185.6MB in the beginning and 671.1MB in the end (delta: 485.5MB). Free memory was 149.0MB in the beginning and 313.8MB in the end (delta: -164.8MB). Peak memory consumption was 321.7MB. Max. memory is 8.0GB. [2022-03-15 16:00:03,205 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.15ms. Allocated memory is still 185.6MB. Free memory is still 150.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:00:03,205 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.06ms. Allocated memory is still 185.6MB. Free memory was 149.0MB in the beginning and 147.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:00:03,205 INFO L158 Benchmark]: Boogie Preprocessor took 16.98ms. Allocated memory is still 185.6MB. Free memory was 147.4MB in the beginning and 146.5MB in the end (delta: 975.8kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 16:00:03,205 INFO L158 Benchmark]: RCFGBuilder took 357.87ms. Allocated memory is still 185.6MB. Free memory was 146.4MB in the beginning and 134.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-15 16:00:03,206 INFO L158 Benchmark]: TraceAbstraction took 668081.58ms. Allocated memory was 185.6MB in the beginning and 671.1MB in the end (delta: 485.5MB). Free memory was 133.7MB in the beginning and 313.8MB in the end (delta: -180.1MB). Peak memory consumption was 306.0MB. Max. memory is 8.0GB. [2022-03-15 16:00:03,206 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 0.15ms. Allocated memory is still 185.6MB. Free memory is still 150.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.06ms. Allocated memory is still 185.6MB. Free memory was 149.0MB in the beginning and 147.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 16.98ms. Allocated memory is still 185.6MB. Free memory was 147.4MB in the beginning and 146.5MB in the end (delta: 975.8kB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 357.87ms. Allocated memory is still 185.6MB. Free memory was 146.4MB in the beginning and 134.1MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 668081.58ms. Allocated memory was 185.6MB in the beginning and 671.1MB in the end (delta: 485.5MB). Free memory was 133.7MB in the beginning and 313.8MB in the end (delta: -180.1MB). Peak memory consumption was 306.0MB. 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 - PositiveResult [Line: 81]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 668.0s, OverallIterations: 388, TraceHistogramMax: 4, PathProgramHistogramMax: 374, EmptinessCheckTime: 0.1s, AutomataDifference: 121.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16386 SdHoareTripleChecker+Valid, 51.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16386 mSDsluCounter, 49537 SdHoareTripleChecker+Invalid, 44.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5518 IncrementalHoareTripleChecker+Unchecked, 81745 mSDsCounter, 4852 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 141061 IncrementalHoareTripleChecker+Invalid, 151431 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4852 mSolverCounterUnsat, 4219 mSDtfsCounter, 141061 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17967 GetRequests, 7873 SyntacticMatches, 971 SemanticMatches, 9123 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 54694 ImplicationChecksByTransitivity, 179.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=231occurred in iteration=228, InterpolantAutomatonStates: 5039, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 388 MinimizatonAttempts, 10604 StatesRemovedByMinimization, 352 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 407.5s InterpolantComputationTime, 13011 NumberOfCodeBlocks, 13011 NumberOfCodeBlocksAsserted, 1237 NumberOfCheckSat, 18275 ConstructedInterpolants, 301 QuantifiedInterpolants, 335178 SizeOfPredicates, 5079 NumberOfNonLiveVariables, 32754 ConjunctsInSsa, 10194 ConjunctsInUnsatCore, 1135 InterpolantComputations, 15 PerfectInterpolantSequences, 1160/10769 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-15 16:00:03,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...