/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/array-eq-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 14:35:46,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 14:35:46,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 14:35:46,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 14:35:46,696 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 [2022-01-28 14:35:46,716 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 14:35:46,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 14:35:46,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 14:35:46,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 14:35:46,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 14:35:46,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 14:35:46,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 14:35:46,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 14:35:46,717 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 14:35:46,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 14:35:46,717 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 14:35:46,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 14:35:46,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 14:35:46,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 14:35:46,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 14:35:46,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 14:35:46,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 14:35:46,718 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 14:35:46,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 14:35:46,718 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 14:35:46,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 14:35:46,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 14:35:46,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 14:35:46,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 14:35:46,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 14:35:46,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 14:35:46,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 14:35:46,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 14:35:46,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 14:35:46,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 14:35:46,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 14:35:46,721 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 14:35:46,721 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 14:35:46,722 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 14:35:46,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 14:35:46,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 14:35:46,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 14:35:46,933 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 14:35:46,940 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 14:35:46,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl [2022-01-28 14:35:46,941 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl' [2022-01-28 14:35:46,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 14:35:46,966 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 14:35:46,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 14:35:46,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 14:35:46,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 14:35:46,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:46" (1/1) ... [2022-01-28 14:35:46,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:46" (1/1) ... [2022-01-28 14:35:47,000 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 14:35:47,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 14:35:47,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 14:35:47,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 14:35:47,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 14:35:47,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:46" (1/1) ... [2022-01-28 14:35:47,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:46" (1/1) ... [2022-01-28 14:35:47,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:46" (1/1) ... [2022-01-28 14:35:47,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:46" (1/1) ... [2022-01-28 14:35:47,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:46" (1/1) ... [2022-01-28 14:35:47,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:46" (1/1) ... [2022-01-28 14:35:47,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:46" (1/1) ... [2022-01-28 14:35:47,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 14:35:47,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 14:35:47,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 14:35:47,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 14:35:47,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:46" (1/1) ... [2022-01-28 14:35:47,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 14:35:47,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:47,038 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) [2022-01-28 14:35:47,040 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 [2022-01-28 14:35:47,065 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 14:35:47,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 14:35:47,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 14:35:47,065 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 14:35:47,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 14:35:47,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 14:35:47,065 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 14:35:47,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 14:35:47,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 14:35:47,066 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 14:35:47,066 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 14:35:47,066 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 14:35:47,066 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 14:35:47,098 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 14:35:47,099 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 14:35:47,236 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 14:35:47,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 14:35:47,245 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 14:35:47,246 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:35:47 BoogieIcfgContainer [2022-01-28 14:35:47,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 14:35:47,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 14:35:47,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 14:35:47,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 14:35:47,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:35:46" (1/2) ... [2022-01-28 14:35:47,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327ef3b0 and model type array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:35:47, skipping insertion in model container [2022-01-28 14:35:47,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:35:47" (2/2) ... [2022-01-28 14:35:47,260 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.bpl [2022-01-28 14:35:47,263 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 14:35:47,263 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 14:35:47,263 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 14:35:47,263 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 14:35:47,295 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-28 14:35:47,331 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 14:35:47,336 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, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-28 14:35:47,336 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-28 14:35:47,343 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 94 flow [2022-01-28 14:35:47,396 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-28 14:35:47,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:47,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:47,410 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:47,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1477602056, now seen corresponding path program 1 times [2022-01-28 14:35:47,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:47,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288356102] [2022-01-28 14:35:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:47,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:47,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:47,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288356102] [2022-01-28 14:35:47,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288356102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:35:47,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:35:47,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 14:35:47,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087848015] [2022-01-28 14:35:47,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:35:47,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:35:47,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:47,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:35:47,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:35:47,656 INFO L87 Difference]: Start difference. First operand has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 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 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:47,799 INFO L93 Difference]: Finished difference Result 606 states and 2050 transitions. [2022-01-28 14:35:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 14:35:47,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-28 14:35:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:47,846 INFO L225 Difference]: With dead ends: 606 [2022-01-28 14:35:47,847 INFO L226 Difference]: Without dead ends: 591 [2022-01-28 14:35:47,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:35:47,854 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:47,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 26 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:35:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-01-28 14:35:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 406. [2022-01-28 14:35:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.3580246913580245) internal successors, (1360), 405 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1360 transitions. [2022-01-28 14:35:47,916 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1360 transitions. Word has length 15 [2022-01-28 14:35:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:47,916 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1360 transitions. [2022-01-28 14:35:47,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1360 transitions. [2022-01-28 14:35:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:35:47,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:47,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:47,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 14:35:47,920 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:47,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:47,920 INFO L85 PathProgramCache]: Analyzing trace with hash 314777040, now seen corresponding path program 1 times [2022-01-28 14:35:47,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:47,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106572078] [2022-01-28 14:35:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:47,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:47,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:47,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106572078] [2022-01-28 14:35:47,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106572078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:35:47,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795107984] [2022-01-28 14:35:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:47,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:47,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:47,999 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) [2022-01-28 14:35:48,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 14:35:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:48,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 14:35:48,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:35:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:48,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:35:48,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:35:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:48,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795107984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:35:48,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:35:48,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-01-28 14:35:48,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050684559] [2022-01-28 14:35:48,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:35:48,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:35:48,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:48,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:35:48,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:35:48,280 INFO L87 Difference]: Start difference. First operand 406 states and 1360 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:48,458 INFO L93 Difference]: Finished difference Result 1387 states and 4491 transitions. [2022-01-28 14:35:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 14:35:48,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 14:35:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:48,467 INFO L225 Difference]: With dead ends: 1387 [2022-01-28 14:35:48,467 INFO L226 Difference]: Without dead ends: 1130 [2022-01-28 14:35:48,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:35:48,470 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 159 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:48,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 137 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:35:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-01-28 14:35:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 440. [2022-01-28 14:35:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.359908883826879) internal successors, (1475), 439 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1475 transitions. [2022-01-28 14:35:48,511 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1475 transitions. Word has length 18 [2022-01-28 14:35:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:48,511 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1475 transitions. [2022-01-28 14:35:48,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:48,512 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1475 transitions. [2022-01-28 14:35:48,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:35:48,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:48,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:48,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-28 14:35:48,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:48,733 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash 777242579, now seen corresponding path program 1 times [2022-01-28 14:35:48,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:48,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891220060] [2022-01-28 14:35:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:48,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:48,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:48,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891220060] [2022-01-28 14:35:48,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891220060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:35:48,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886396073] [2022-01-28 14:35:48,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:48,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:48,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:48,891 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) [2022-01-28 14:35:48,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 14:35:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:35:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:35:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:49,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:35:49,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:35:49,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-01-28 14:35:49,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:35:49,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-28 14:35:49,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:35:49,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:35:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:49,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886396073] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:35:49,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:35:49,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2022-01-28 14:35:49,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485015066] [2022-01-28 14:35:49,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:35:49,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 14:35:49,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 14:35:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:35:49,293 INFO L87 Difference]: Start difference. First operand 440 states and 1475 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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) [2022-01-28 14:35:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:49,589 INFO L93 Difference]: Finished difference Result 1656 states and 5504 transitions. [2022-01-28 14:35:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:35:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 14:35:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:49,597 INFO L225 Difference]: With dead ends: 1656 [2022-01-28 14:35:49,597 INFO L226 Difference]: Without dead ends: 1415 [2022-01-28 14:35:49,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:35:49,599 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 285 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:49,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 84 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:35:49,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-01-28 14:35:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 637. [2022-01-28 14:35:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.49685534591195) internal successors, (2224), 636 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2224 transitions. [2022-01-28 14:35:49,651 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2224 transitions. Word has length 18 [2022-01-28 14:35:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:49,651 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 2224 transitions. [2022-01-28 14:35:49,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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) [2022-01-28 14:35:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2224 transitions. [2022-01-28 14:35:49,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:35:49,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:49,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:49,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 14:35:49,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-28 14:35:49,863 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 384589864, now seen corresponding path program 1 times [2022-01-28 14:35:49,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:49,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657701431] [2022-01-28 14:35:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:49,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:49,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:49,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657701431] [2022-01-28 14:35:49,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657701431] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:35:49,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:35:49,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:35:49,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956681126] [2022-01-28 14:35:49,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:35:49,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:35:49,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:49,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:35:49,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:35:49,933 INFO L87 Difference]: Start difference. First operand 637 states and 2224 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2022-01-28 14:35:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:50,025 INFO L93 Difference]: Finished difference Result 1165 states and 3991 transitions. [2022-01-28 14:35:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 14:35:50,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 [2022-01-28 14:35:50,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:50,031 INFO L225 Difference]: With dead ends: 1165 [2022-01-28 14:35:50,031 INFO L226 Difference]: Without dead ends: 922 [2022-01-28 14:35:50,031 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 [2022-01-28 14:35:50,033 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:50,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 63 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:35:50,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-01-28 14:35:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 692. [2022-01-28 14:35:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.4905933429811866) internal successors, (2412), 691 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2412 transitions. [2022-01-28 14:35:50,055 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2412 transitions. Word has length 18 [2022-01-28 14:35:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:50,055 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 2412 transitions. [2022-01-28 14:35:50,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2022-01-28 14:35:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2412 transitions. [2022-01-28 14:35:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:35:50,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:50,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:50,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-28 14:35:50,058 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:50,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:50,059 INFO L85 PathProgramCache]: Analyzing trace with hash -670667898, now seen corresponding path program 2 times [2022-01-28 14:35:50,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:50,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331981849] [2022-01-28 14:35:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:50,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:50,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:50,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331981849] [2022-01-28 14:35:50,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331981849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:35:50,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:35:50,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:35:50,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839203597] [2022-01-28 14:35:50,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:35:50,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:35:50,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:50,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:35:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:35:50,122 INFO L87 Difference]: Start difference. First operand 692 states and 2412 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2022-01-28 14:35:50,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:50,217 INFO L93 Difference]: Finished difference Result 1341 states and 4473 transitions. [2022-01-28 14:35:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 14:35:50,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 [2022-01-28 14:35:50,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:50,223 INFO L225 Difference]: With dead ends: 1341 [2022-01-28 14:35:50,223 INFO L226 Difference]: Without dead ends: 1080 [2022-01-28 14:35:50,224 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 [2022-01-28 14:35:50,224 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:50,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 68 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:35:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-01-28 14:35:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 710. [2022-01-28 14:35:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.459802538787024) internal successors, (2453), 709 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2453 transitions. [2022-01-28 14:35:50,246 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2453 transitions. Word has length 18 [2022-01-28 14:35:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:50,247 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 2453 transitions. [2022-01-28 14:35:50,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2022-01-28 14:35:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2453 transitions. [2022-01-28 14:35:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:35:50,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:50,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:50,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-28 14:35:50,250 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:50,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:50,250 INFO L85 PathProgramCache]: Analyzing trace with hash 141777002, now seen corresponding path program 2 times [2022-01-28 14:35:50,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:50,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62917700] [2022-01-28 14:35:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:50,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:50,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62917700] [2022-01-28 14:35:50,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62917700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:35:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015868428] [2022-01-28 14:35:50,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:35:50,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:50,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:50,323 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) [2022-01-28 14:35:50,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:35:50,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:35:50,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 14:35:50,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:35:50,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 14:35:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:50,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:35:50,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:35:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:50,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015868428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:35:50,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:35:50,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2022-01-28 14:35:50,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925531652] [2022-01-28 14:35:50,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:35:50,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 14:35:50,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:50,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 14:35:50,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:35:50,660 INFO L87 Difference]: Start difference. First operand 710 states and 2453 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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) [2022-01-28 14:35:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:51,095 INFO L93 Difference]: Finished difference Result 2749 states and 9004 transitions. [2022-01-28 14:35:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:35:51,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 14:35:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:51,105 INFO L225 Difference]: With dead ends: 2749 [2022-01-28 14:35:51,106 INFO L226 Difference]: Without dead ends: 2192 [2022-01-28 14:35:51,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:35:51,106 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 380 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:51,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 281 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:35:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2022-01-28 14:35:51,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1040. [2022-01-28 14:35:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 3.623676612127045) internal successors, (3765), 1039 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3765 transitions. [2022-01-28 14:35:51,138 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3765 transitions. Word has length 18 [2022-01-28 14:35:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:51,138 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 3765 transitions. [2022-01-28 14:35:51,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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) [2022-01-28 14:35:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3765 transitions. [2022-01-28 14:35:51,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:35:51,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:51,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:51,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-28 14:35:51,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:51,356 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1785499653, now seen corresponding path program 1 times [2022-01-28 14:35:51,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:51,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433270487] [2022-01-28 14:35:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:51,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:51,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:51,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433270487] [2022-01-28 14:35:51,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433270487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:35:51,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447295540] [2022-01-28 14:35:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:51,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:51,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:51,445 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) [2022-01-28 14:35:51,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 14:35:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:51,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 14:35:51,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:35:51,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:35:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:51,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:35:51,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:35:51,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:35:51,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:35:51,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:35:51,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:35:51,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:35:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:51,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447295540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:35:51,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:35:51,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-01-28 14:35:51,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182929802] [2022-01-28 14:35:51,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:35:51,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 14:35:51,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:51,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 14:35:51,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:35:51,865 INFO L87 Difference]: Start difference. First operand 1040 states and 3765 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:52,230 INFO L93 Difference]: Finished difference Result 3114 states and 10907 transitions. [2022-01-28 14:35:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:35:52,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 14:35:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:52,244 INFO L225 Difference]: With dead ends: 3114 [2022-01-28 14:35:52,244 INFO L226 Difference]: Without dead ends: 2931 [2022-01-28 14:35:52,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:35:52,245 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 226 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:52,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 258 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:35:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2022-01-28 14:35:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 1769. [2022-01-28 14:35:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 3.690610859728507) internal successors, (6525), 1768 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 6525 transitions. [2022-01-28 14:35:52,304 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 6525 transitions. Word has length 21 [2022-01-28 14:35:52,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:52,304 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 6525 transitions. [2022-01-28 14:35:52,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 6525 transitions. [2022-01-28 14:35:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:35:52,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:52,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:52,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 14:35:52,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:52,529 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash 145242945, now seen corresponding path program 1 times [2022-01-28 14:35:52,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:52,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095128692] [2022-01-28 14:35:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:52,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:52,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:52,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095128692] [2022-01-28 14:35:52,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095128692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:35:52,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720455014] [2022-01-28 14:35:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:52,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:52,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:52,588 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) [2022-01-28 14:35:52,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 14:35:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:52,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-28 14:35:52,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:35:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:52,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:35:52,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:35:52,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:35:53,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:35:53,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-28 14:35:53,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:35:53,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-28 14:35:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:53,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720455014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:35:53,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:35:53,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-01-28 14:35:53,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422628501] [2022-01-28 14:35:53,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:35:53,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 14:35:53,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:53,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 14:35:53,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:35:53,172 INFO L87 Difference]: Start difference. First operand 1769 states and 6525 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:53,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:53,980 INFO L93 Difference]: Finished difference Result 5233 states and 17883 transitions. [2022-01-28 14:35:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 14:35:53,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 14:35:53,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:54,003 INFO L225 Difference]: With dead ends: 5233 [2022-01-28 14:35:54,003 INFO L226 Difference]: Without dead ends: 4899 [2022-01-28 14:35:54,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 14:35:54,004 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 692 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:54,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 220 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:35:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2022-01-28 14:35:54,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 2499. [2022-01-28 14:35:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 3.6937550040032026) internal successors, (9227), 2498 states have internal predecessors, (9227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 9227 transitions. [2022-01-28 14:35:54,092 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 9227 transitions. Word has length 21 [2022-01-28 14:35:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:54,093 INFO L470 AbstractCegarLoop]: Abstraction has 2499 states and 9227 transitions. [2022-01-28 14:35:54,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 9227 transitions. [2022-01-28 14:35:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:35:54,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:54,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:54,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 14:35:54,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:54,315 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2088581083, now seen corresponding path program 2 times [2022-01-28 14:35:54,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:54,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616211610] [2022-01-28 14:35:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:54,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:54,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:54,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616211610] [2022-01-28 14:35:54,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616211610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:35:54,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404715820] [2022-01-28 14:35:54,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:35:54,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:54,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:54,396 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) [2022-01-28 14:35:54,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 14:35:54,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:35:54,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:35:54,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:35:54,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:35:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:54,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-28 14:35:54,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404715820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:35:54,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-28 14:35:54,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-01-28 14:35:54,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781668573] [2022-01-28 14:35:54,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:35:54,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:35:54,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:54,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:35:54,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:35:54,562 INFO L87 Difference]: Start difference. First operand 2499 states and 9227 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-28 14:35:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:54,706 INFO L93 Difference]: Finished difference Result 4412 states and 15908 transitions. [2022-01-28 14:35:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 14:35:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 14:35:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:54,721 INFO L225 Difference]: With dead ends: 4412 [2022-01-28 14:35:54,721 INFO L226 Difference]: Without dead ends: 4406 [2022-01-28 14:35:54,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:35:54,722 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:54,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 45 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:35:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2022-01-28 14:35:54,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 2607. [2022-01-28 14:35:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 3.7003069838833462) internal successors, (9643), 2606 states have internal predecessors, (9643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 9643 transitions. [2022-01-28 14:35:54,795 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 9643 transitions. Word has length 21 [2022-01-28 14:35:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:54,795 INFO L470 AbstractCegarLoop]: Abstraction has 2607 states and 9643 transitions. [2022-01-28 14:35:54,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-28 14:35:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 9643 transitions. [2022-01-28 14:35:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:35:54,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:54,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:54,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-28 14:35:55,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:55,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:55,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:55,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1175176701, now seen corresponding path program 3 times [2022-01-28 14:35:55,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:55,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758882982] [2022-01-28 14:35:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:55,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:55,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758882982] [2022-01-28 14:35:55,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758882982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:35:55,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481035418] [2022-01-28 14:35:55,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:35:55,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:55,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:55,100 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) [2022-01-28 14:35:55,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 14:35:55,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:35:55,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:35:55,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 14:35:55,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:35:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:55,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:35:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:55,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481035418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:35:55,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:35:55,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 13 [2022-01-28 14:35:55,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681050850] [2022-01-28 14:35:55,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:35:55,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 14:35:55,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 14:35:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:35:55,440 INFO L87 Difference]: Start difference. First operand 2607 states and 9643 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:56,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:56,551 INFO L93 Difference]: Finished difference Result 8841 states and 29658 transitions. [2022-01-28 14:35:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 14:35:56,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 14:35:56,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:56,576 INFO L225 Difference]: With dead ends: 8841 [2022-01-28 14:35:56,576 INFO L226 Difference]: Without dead ends: 8268 [2022-01-28 14:35:56,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=1411, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 14:35:56,577 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 485 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:56,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 404 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:35:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8268 states. [2022-01-28 14:35:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8268 to 2045. [2022-01-28 14:35:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.6183953033268104) internal successors, (7396), 2044 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7396 transitions. [2022-01-28 14:35:56,666 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7396 transitions. Word has length 21 [2022-01-28 14:35:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:56,666 INFO L470 AbstractCegarLoop]: Abstraction has 2045 states and 7396 transitions. [2022-01-28 14:35:56,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7396 transitions. [2022-01-28 14:35:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:35:56,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:56,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:56,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-28 14:35:56,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:56,908 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:56,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2130983577, now seen corresponding path program 2 times [2022-01-28 14:35:56,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:56,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505246398] [2022-01-28 14:35:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:56,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:56,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:56,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505246398] [2022-01-28 14:35:56,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505246398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:35:56,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:35:56,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:35:56,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800222126] [2022-01-28 14:35:56,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:35:56,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:35:56,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:35:56,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:35:56,964 INFO L87 Difference]: Start difference. First operand 2045 states and 7396 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-28 14:35:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:57,045 INFO L93 Difference]: Finished difference Result 2479 states and 8813 transitions. [2022-01-28 14:35:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 14:35:57,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 14:35:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:57,051 INFO L225 Difference]: With dead ends: 2479 [2022-01-28 14:35:57,051 INFO L226 Difference]: Without dead ends: 2455 [2022-01-28 14:35:57,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:35:57,052 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:57,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 48 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:35:57,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2022-01-28 14:35:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2041. [2022-01-28 14:35:57,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.618137254901961) internal successors, (7381), 2040 states have internal predecessors, (7381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7381 transitions. [2022-01-28 14:35:57,122 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7381 transitions. Word has length 21 [2022-01-28 14:35:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:57,122 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 7381 transitions. [2022-01-28 14:35:57,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-28 14:35:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7381 transitions. [2022-01-28 14:35:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:35:57,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:57,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:57,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-28 14:35:57,128 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:57,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:57,128 INFO L85 PathProgramCache]: Analyzing trace with hash 998835253, now seen corresponding path program 3 times [2022-01-28 14:35:57,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:57,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978733564] [2022-01-28 14:35:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:57,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:57,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:57,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978733564] [2022-01-28 14:35:57,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978733564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:35:57,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:35:57,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:35:57,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761205782] [2022-01-28 14:35:57,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:35:57,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:35:57,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:57,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:35:57,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:35:57,172 INFO L87 Difference]: Start difference. First operand 2041 states and 7381 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-28 14:35:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:57,259 INFO L93 Difference]: Finished difference Result 2469 states and 8793 transitions. [2022-01-28 14:35:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:35:57,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 14:35:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:57,266 INFO L225 Difference]: With dead ends: 2469 [2022-01-28 14:35:57,266 INFO L226 Difference]: Without dead ends: 2463 [2022-01-28 14:35:57,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:35:57,266 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 35 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:57,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:35:57,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2022-01-28 14:35:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2067. [2022-01-28 14:35:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 3.6108422071636013) internal successors, (7460), 2066 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 7460 transitions. [2022-01-28 14:35:57,310 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 7460 transitions. Word has length 21 [2022-01-28 14:35:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:57,310 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 7460 transitions. [2022-01-28 14:35:57,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-28 14:35:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 7460 transitions. [2022-01-28 14:35:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 14:35:57,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:57,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:57,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-28 14:35:57,315 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash 239897023, now seen corresponding path program 4 times [2022-01-28 14:35:57,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:57,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135784739] [2022-01-28 14:35:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:57,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:35:57,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:57,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135784739] [2022-01-28 14:35:57,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135784739] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:35:57,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:35:57,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:35:57,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044706380] [2022-01-28 14:35:57,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:35:57,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:35:57,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:57,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:35:57,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:35:57,353 INFO L87 Difference]: Start difference. First operand 2067 states and 7460 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-28 14:35:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:57,426 INFO L93 Difference]: Finished difference Result 2427 states and 8660 transitions. [2022-01-28 14:35:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 14:35:57,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-28 14:35:57,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:57,432 INFO L225 Difference]: With dead ends: 2427 [2022-01-28 14:35:57,432 INFO L226 Difference]: Without dead ends: 2401 [2022-01-28 14:35:57,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:35:57,432 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:57,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:35:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2022-01-28 14:35:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2041. [2022-01-28 14:35:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.6176470588235294) internal successors, (7380), 2040 states have internal predecessors, (7380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7380 transitions. [2022-01-28 14:35:57,469 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7380 transitions. Word has length 21 [2022-01-28 14:35:57,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:57,470 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 7380 transitions. [2022-01-28 14:35:57,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2022-01-28 14:35:57,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7380 transitions. [2022-01-28 14:35:57,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:35:57,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:57,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:57,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-28 14:35:57,476 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1796214363, now seen corresponding path program 1 times [2022-01-28 14:35:57,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:57,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292071462] [2022-01-28 14:35:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:57,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:35:57,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:57,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292071462] [2022-01-28 14:35:57,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292071462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:35:57,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146109678] [2022-01-28 14:35:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:57,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:57,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:57,552 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) [2022-01-28 14:35:57,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 14:35:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 14:35:57,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:35:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:35:57,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:35:57,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:35:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:35:58,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146109678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:35:58,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:35:58,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-28 14:35:58,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130809697] [2022-01-28 14:35:58,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:35:58,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:35:58,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:35:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:35:58,050 INFO L87 Difference]: Start difference. First operand 2041 states and 7380 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 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) [2022-01-28 14:35:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:58,545 INFO L93 Difference]: Finished difference Result 4176 states and 14263 transitions. [2022-01-28 14:35:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:35:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:35:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:58,554 INFO L225 Difference]: With dead ends: 4176 [2022-01-28 14:35:58,554 INFO L226 Difference]: Without dead ends: 3709 [2022-01-28 14:35:58,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:35:58,555 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 357 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:58,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 495 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:35:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3709 states. [2022-01-28 14:35:58,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3709 to 2366. [2022-01-28 14:35:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2365 states have (on average 3.691754756871036) internal successors, (8731), 2365 states have internal predecessors, (8731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:35:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 8731 transitions. [2022-01-28 14:35:58,630 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 8731 transitions. Word has length 24 [2022-01-28 14:35:58,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:35:58,630 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 8731 transitions. [2022-01-28 14:35:58,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 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) [2022-01-28 14:35:58,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 8731 transitions. [2022-01-28 14:35:58,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:35:58,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:35:58,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:35:58,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-28 14:35:58,843 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,SelfDestructingSolverStorable13 [2022-01-28 14:35:58,844 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:35:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:35:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash 64795745, now seen corresponding path program 2 times [2022-01-28 14:35:58,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:35:58,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025798143] [2022-01-28 14:35:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:35:58,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:35:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:35:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:35:58,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:35:58,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025798143] [2022-01-28 14:35:58,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025798143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:35:58,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112969929] [2022-01-28 14:35:58,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:35:58,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:35:58,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:35:58,906 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) [2022-01-28 14:35:58,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 14:35:58,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:35:58,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:35:58,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 14:35:58,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:35:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:35:59,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:35:59,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:35:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:35:59,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112969929] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:35:59,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:35:59,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-28 14:35:59,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332604493] [2022-01-28 14:35:59,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:35:59,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:35:59,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:35:59,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:35:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:35:59,377 INFO L87 Difference]: Start difference. First operand 2366 states and 8731 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 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) [2022-01-28 14:35:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:35:59,939 INFO L93 Difference]: Finished difference Result 6103 states and 21705 transitions. [2022-01-28 14:35:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:35:59,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:35:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:35:59,952 INFO L225 Difference]: With dead ends: 6103 [2022-01-28 14:35:59,952 INFO L226 Difference]: Without dead ends: 5434 [2022-01-28 14:35:59,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-01-28 14:35:59,953 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 494 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:35:59,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 471 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:35:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2022-01-28 14:36:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 3427. [2022-01-28 14:36:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 3.7802101576182134) internal successors, (12951), 3426 states have internal predecessors, (12951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 12951 transitions. [2022-01-28 14:36:00,028 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 12951 transitions. Word has length 24 [2022-01-28 14:36:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:00,028 INFO L470 AbstractCegarLoop]: Abstraction has 3427 states and 12951 transitions. [2022-01-28 14:36:00,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 15 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) [2022-01-28 14:36:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 12951 transitions. [2022-01-28 14:36:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:36:00,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:00,035 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:00,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:00,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-28 14:36:00,254 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:00,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:00,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1659948581, now seen corresponding path program 1 times [2022-01-28 14:36:00,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:00,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067523464] [2022-01-28 14:36:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:00,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:00,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:00,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067523464] [2022-01-28 14:36:00,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067523464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:00,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492589742] [2022-01-28 14:36:00,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:00,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:00,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:00,319 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) [2022-01-28 14:36:00,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 14:36:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:00,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:36:00,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:00,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:36:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:00,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:00,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:00,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-28 14:36:00,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:00,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:00,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:00,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:36:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:00,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492589742] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:00,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:00,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-01-28 14:36:00,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223039406] [2022-01-28 14:36:00,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:00,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 14:36:00,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:00,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 14:36:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:36:00,530 INFO L87 Difference]: Start difference. First operand 3427 states and 12951 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:00,910 INFO L93 Difference]: Finished difference Result 6252 states and 22222 transitions. [2022-01-28 14:36:00,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:36:00,911 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:36:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:00,924 INFO L225 Difference]: With dead ends: 6252 [2022-01-28 14:36:00,924 INFO L226 Difference]: Without dead ends: 5110 [2022-01-28 14:36:00,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:36:00,924 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 150 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:00,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 209 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:36:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5110 states. [2022-01-28 14:36:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5110 to 2783. [2022-01-28 14:36:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.6746944644140904) internal successors, (10223), 2782 states have internal predecessors, (10223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 10223 transitions. [2022-01-28 14:36:00,987 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 10223 transitions. Word has length 24 [2022-01-28 14:36:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:00,987 INFO L470 AbstractCegarLoop]: Abstraction has 2783 states and 10223 transitions. [2022-01-28 14:36:00,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 10223 transitions. [2022-01-28 14:36:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:36:00,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:00,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:01,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:01,207 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,SelfDestructingSolverStorable15 [2022-01-28 14:36:01,208 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:01,208 INFO L85 PathProgramCache]: Analyzing trace with hash 364222817, now seen corresponding path program 2 times [2022-01-28 14:36:01,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:01,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559878071] [2022-01-28 14:36:01,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:01,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:01,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:01,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559878071] [2022-01-28 14:36:01,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559878071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:01,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679055970] [2022-01-28 14:36:01,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:36:01,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:01,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:01,266 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) [2022-01-28 14:36:01,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 14:36:01,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:36:01,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:01,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:36:01,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:01,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:36:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:01,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:01,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:01,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-28 14:36:01,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:01,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:01,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:01,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:36:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:01,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679055970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:01,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:01,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-01-28 14:36:01,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464708213] [2022-01-28 14:36:01,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:01,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 14:36:01,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:01,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 14:36:01,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:36:01,507 INFO L87 Difference]: Start difference. First operand 2783 states and 10223 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2022-01-28 14:36:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:01,797 INFO L93 Difference]: Finished difference Result 6449 states and 22980 transitions. [2022-01-28 14:36:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:36:01,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:36:01,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:01,812 INFO L225 Difference]: With dead ends: 6449 [2022-01-28 14:36:01,812 INFO L226 Difference]: Without dead ends: 6404 [2022-01-28 14:36:01,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:36:01,813 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 184 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:01,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 178 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:36:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6404 states. [2022-01-28 14:36:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6404 to 3449. [2022-01-28 14:36:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 3.7375290023201857) internal successors, (12887), 3448 states have internal predecessors, (12887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 12887 transitions. [2022-01-28 14:36:01,935 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 12887 transitions. Word has length 24 [2022-01-28 14:36:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:01,935 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 12887 transitions. [2022-01-28 14:36:01,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2022-01-28 14:36:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 12887 transitions. [2022-01-28 14:36:01,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:36:01,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:01,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:01,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:02,157 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,SelfDestructingSolverStorable16 [2022-01-28 14:36:02,157 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1300430463, now seen corresponding path program 1 times [2022-01-28 14:36:02,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:02,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352525067] [2022-01-28 14:36:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:02,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:02,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:02,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352525067] [2022-01-28 14:36:02,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352525067] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:02,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801506141] [2022-01-28 14:36:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:02,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:02,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:02,338 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) [2022-01-28 14:36:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:02,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 14:36:02,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:02,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 14:36:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:02,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:02,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:02,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:36:03,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:03,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:36:03,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:03,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-01-28 14:36:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:03,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801506141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:03,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:03,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-01-28 14:36:03,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541672075] [2022-01-28 14:36:03,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:03,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:36:03,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:03,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:36:03,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:36:03,110 INFO L87 Difference]: Start difference. First operand 3449 states and 12887 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 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) [2022-01-28 14:36:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:03,728 INFO L93 Difference]: Finished difference Result 5722 states and 20599 transitions. [2022-01-28 14:36:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 14:36:03,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:36:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:03,740 INFO L225 Difference]: With dead ends: 5722 [2022-01-28 14:36:03,740 INFO L226 Difference]: Without dead ends: 5018 [2022-01-28 14:36:03,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:36:03,740 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 278 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:03,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 248 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:36:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2022-01-28 14:36:03,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 3923. [2022-01-28 14:36:03,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3923 states, 3922 states have (on average 3.752677205507394) internal successors, (14718), 3922 states have internal predecessors, (14718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3923 states to 3923 states and 14718 transitions. [2022-01-28 14:36:03,815 INFO L78 Accepts]: Start accepts. Automaton has 3923 states and 14718 transitions. Word has length 24 [2022-01-28 14:36:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:03,815 INFO L470 AbstractCegarLoop]: Abstraction has 3923 states and 14718 transitions. [2022-01-28 14:36:03,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 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) [2022-01-28 14:36:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3923 states and 14718 transitions. [2022-01-28 14:36:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:36:03,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:03,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:03,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:04,035 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,SelfDestructingSolverStorable17 [2022-01-28 14:36:04,035 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:04,036 INFO L85 PathProgramCache]: Analyzing trace with hash -310047807, now seen corresponding path program 1 times [2022-01-28 14:36:04,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:04,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521192366] [2022-01-28 14:36:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:04,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:04,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:04,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521192366] [2022-01-28 14:36:04,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521192366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:04,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91705088] [2022-01-28 14:36:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:04,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:04,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:04,111 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) [2022-01-28 14:36:04,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 14:36:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:04,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-28 14:36:04,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:04,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:04,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:04,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:36:04,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:04,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-01-28 14:36:04,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:04,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-28 14:36:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:04,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91705088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:04,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:04,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-01-28 14:36:04,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720610142] [2022-01-28 14:36:04,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:04,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:36:04,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:04,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:36:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:36:04,662 INFO L87 Difference]: Start difference. First operand 3923 states and 14718 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 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) [2022-01-28 14:36:05,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:05,027 INFO L93 Difference]: Finished difference Result 5006 states and 17977 transitions. [2022-01-28 14:36:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:36:05,028 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:36:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:05,037 INFO L225 Difference]: With dead ends: 5006 [2022-01-28 14:36:05,037 INFO L226 Difference]: Without dead ends: 4270 [2022-01-28 14:36:05,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:36:05,037 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 324 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:05,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 153 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:36:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2022-01-28 14:36:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 3699. [2022-01-28 14:36:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3698 states have (on average 3.7420227149810708) internal successors, (13838), 3698 states have internal predecessors, (13838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:05,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 13838 transitions. [2022-01-28 14:36:05,104 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 13838 transitions. Word has length 24 [2022-01-28 14:36:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:05,104 INFO L470 AbstractCegarLoop]: Abstraction has 3699 states and 13838 transitions. [2022-01-28 14:36:05,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 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) [2022-01-28 14:36:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 13838 transitions. [2022-01-28 14:36:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:36:05,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:05,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:05,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:05,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:05,327 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1944744923, now seen corresponding path program 1 times [2022-01-28 14:36:05,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:05,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719660801] [2022-01-28 14:36:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:05,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:05,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:05,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719660801] [2022-01-28 14:36:05,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719660801] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:05,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807378304] [2022-01-28 14:36:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:05,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:05,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:05,378 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) [2022-01-28 14:36:05,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 14:36:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:05,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:36:05,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:05,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:36:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:05,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:05,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:05,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:36:05,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:05,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:05,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:05,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:05,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807378304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:05,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:05,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-28 14:36:05,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219146716] [2022-01-28 14:36:05,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:05,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 14:36:05,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:05,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 14:36:05,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:05,584 INFO L87 Difference]: Start difference. First operand 3699 states and 13838 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-01-28 14:36:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:05,788 INFO L93 Difference]: Finished difference Result 4513 states and 16366 transitions. [2022-01-28 14:36:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:36:05,789 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 24 [2022-01-28 14:36:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:05,798 INFO L225 Difference]: With dead ends: 4513 [2022-01-28 14:36:05,798 INFO L226 Difference]: Without dead ends: 4326 [2022-01-28 14:36:05,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:36:05,798 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 177 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:05,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 162 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:05,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2022-01-28 14:36:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3572. [2022-01-28 14:36:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 3571 states have (on average 3.7306076729207507) internal successors, (13322), 3571 states have internal predecessors, (13322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 13322 transitions. [2022-01-28 14:36:05,882 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 13322 transitions. Word has length 24 [2022-01-28 14:36:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:05,882 INFO L470 AbstractCegarLoop]: Abstraction has 3572 states and 13322 transitions. [2022-01-28 14:36:05,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-01-28 14:36:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 13322 transitions. [2022-01-28 14:36:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:36:05,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:05,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:05,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:06,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:06,105 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:06,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2018102235, now seen corresponding path program 3 times [2022-01-28 14:36:06,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:06,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952262566] [2022-01-28 14:36:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:06,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:06,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:06,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952262566] [2022-01-28 14:36:06,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952262566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:06,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624168425] [2022-01-28 14:36:06,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:36:06,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:06,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:06,151 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) [2022-01-28 14:36:06,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 14:36:06,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 14:36:06,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:06,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:36:06,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:06,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:36:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:06,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:06,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:06,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:36:06,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:06,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:06,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:06,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:06,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624168425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:06,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:06,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-01-28 14:36:06,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086439986] [2022-01-28 14:36:06,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:06,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 14:36:06,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:06,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 14:36:06,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:06,372 INFO L87 Difference]: Start difference. First operand 3572 states and 13322 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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) [2022-01-28 14:36:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:06,568 INFO L93 Difference]: Finished difference Result 4056 states and 14546 transitions. [2022-01-28 14:36:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:36:06,568 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:36:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:06,576 INFO L225 Difference]: With dead ends: 4056 [2022-01-28 14:36:06,576 INFO L226 Difference]: Without dead ends: 3564 [2022-01-28 14:36:06,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:36:06,577 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 144 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:06,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 128 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2022-01-28 14:36:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3118. [2022-01-28 14:36:06,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3117 states have (on average 3.7388514597369267) internal successors, (11654), 3117 states have internal predecessors, (11654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 11654 transitions. [2022-01-28 14:36:06,631 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 11654 transitions. Word has length 24 [2022-01-28 14:36:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:06,631 INFO L470 AbstractCegarLoop]: Abstraction has 3118 states and 11654 transitions. [2022-01-28 14:36:06,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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) [2022-01-28 14:36:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 11654 transitions. [2022-01-28 14:36:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:36:06,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:06,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:06,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:06,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:06,853 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:06,853 INFO L85 PathProgramCache]: Analyzing trace with hash -451668925, now seen corresponding path program 4 times [2022-01-28 14:36:06,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:06,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110569712] [2022-01-28 14:36:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:06,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:06,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:06,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110569712] [2022-01-28 14:36:06,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110569712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:06,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033126770] [2022-01-28 14:36:06,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:36:06,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:06,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:06,905 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) [2022-01-28 14:36:06,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 14:36:06,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:36:06,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:06,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:36:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:07,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:36:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:07,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:07,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:07,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:36:07,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:07,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:07,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:07,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:07,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033126770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:07,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:07,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-28 14:36:07,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055846386] [2022-01-28 14:36:07,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:07,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 14:36:07,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:07,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 14:36:07,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:07,143 INFO L87 Difference]: Start difference. First operand 3118 states and 11654 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2022-01-28 14:36:07,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:07,313 INFO L93 Difference]: Finished difference Result 3582 states and 13262 transitions. [2022-01-28 14:36:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:36:07,313 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:36:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:07,321 INFO L225 Difference]: With dead ends: 3582 [2022-01-28 14:36:07,321 INFO L226 Difference]: Without dead ends: 3582 [2022-01-28 14:36:07,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:36:07,322 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 139 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:07,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 120 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2022-01-28 14:36:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3326. [2022-01-28 14:36:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 3.732330827067669) internal successors, (12410), 3325 states have internal predecessors, (12410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 12410 transitions. [2022-01-28 14:36:07,402 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 12410 transitions. Word has length 24 [2022-01-28 14:36:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:07,402 INFO L470 AbstractCegarLoop]: Abstraction has 3326 states and 12410 transitions. [2022-01-28 14:36:07,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2022-01-28 14:36:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 12410 transitions. [2022-01-28 14:36:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:36:07,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:07,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:07,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:07,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-28 14:36:07,621 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:07,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:07,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1138655409, now seen corresponding path program 5 times [2022-01-28 14:36:07,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:07,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136140719] [2022-01-28 14:36:07,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:07,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:07,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:07,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136140719] [2022-01-28 14:36:07,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136140719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:07,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84753444] [2022-01-28 14:36:07,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:36:07,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:07,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:07,682 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) [2022-01-28 14:36:07,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 14:36:07,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:36:07,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:07,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:36:07,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:07,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:36:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:07,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:07,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:07,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:36:07,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:07,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:07,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:07,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:07,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84753444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:07,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:07,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-01-28 14:36:07,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732916314] [2022-01-28 14:36:07,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:07,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 14:36:07,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:07,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 14:36:07,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:07,928 INFO L87 Difference]: Start difference. First operand 3326 states and 12410 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-28 14:36:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:08,152 INFO L93 Difference]: Finished difference Result 5484 states and 19412 transitions. [2022-01-28 14:36:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:36:08,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:36:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:08,165 INFO L225 Difference]: With dead ends: 5484 [2022-01-28 14:36:08,165 INFO L226 Difference]: Without dead ends: 5044 [2022-01-28 14:36:08,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:36:08,166 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:08,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 137 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2022-01-28 14:36:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 2987. [2022-01-28 14:36:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2987 states, 2986 states have (on average 3.672136637642331) internal successors, (10965), 2986 states have internal predecessors, (10965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 10965 transitions. [2022-01-28 14:36:08,233 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 10965 transitions. Word has length 24 [2022-01-28 14:36:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:08,233 INFO L470 AbstractCegarLoop]: Abstraction has 2987 states and 10965 transitions. [2022-01-28 14:36:08,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-28 14:36:08,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 10965 transitions. [2022-01-28 14:36:08,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:36:08,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:08,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:08,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:08,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:08,455 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:08,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:08,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1763827543, now seen corresponding path program 6 times [2022-01-28 14:36:08,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:08,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131647123] [2022-01-28 14:36:08,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:08,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:08,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:08,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131647123] [2022-01-28 14:36:08,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131647123] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:08,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087969802] [2022-01-28 14:36:08,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:36:08,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:08,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:08,499 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) [2022-01-28 14:36:08,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 14:36:08,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:36:08,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:08,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:36:08,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:08,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:36:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:08,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:08,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:08,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:36:08,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:08,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:08,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:08,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:08,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087969802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:08,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:08,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-28 14:36:08,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896035456] [2022-01-28 14:36:08,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:08,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 14:36:08,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:08,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 14:36:08,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:08,717 INFO L87 Difference]: Start difference. First operand 2987 states and 10965 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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) [2022-01-28 14:36:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:08,861 INFO L93 Difference]: Finished difference Result 3479 states and 12527 transitions. [2022-01-28 14:36:08,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:36:08,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:36:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:08,884 INFO L225 Difference]: With dead ends: 3479 [2022-01-28 14:36:08,884 INFO L226 Difference]: Without dead ends: 3479 [2022-01-28 14:36:08,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:36:08,885 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 167 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:08,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 110 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2022-01-28 14:36:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 2946. [2022-01-28 14:36:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 3.6512733446519525) internal successors, (10753), 2945 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 10753 transitions. [2022-01-28 14:36:08,927 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 10753 transitions. Word has length 24 [2022-01-28 14:36:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:08,928 INFO L470 AbstractCegarLoop]: Abstraction has 2946 states and 10753 transitions. [2022-01-28 14:36:08,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 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) [2022-01-28 14:36:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 10753 transitions. [2022-01-28 14:36:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:36:08,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:08,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:08,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:09,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:09,147 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1785525385, now seen corresponding path program 2 times [2022-01-28 14:36:09,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:09,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187388202] [2022-01-28 14:36:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:09,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:09,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:09,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187388202] [2022-01-28 14:36:09,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187388202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:09,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678915034] [2022-01-28 14:36:09,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:36:09,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:09,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:09,316 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) [2022-01-28 14:36:09,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 14:36:09,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:36:09,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:09,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 14:36:09,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:09,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:09,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:09,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:36:09,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:09,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-01-28 14:36:09,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:09,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-01-28 14:36:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:09,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678915034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:09,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:09,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-01-28 14:36:09,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748984124] [2022-01-28 14:36:09,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:09,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:36:09,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:09,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:36:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:36:09,963 INFO L87 Difference]: Start difference. First operand 2946 states and 10753 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 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) [2022-01-28 14:36:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:10,445 INFO L93 Difference]: Finished difference Result 4316 states and 15141 transitions. [2022-01-28 14:36:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:36:10,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:36:10,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:10,489 INFO L225 Difference]: With dead ends: 4316 [2022-01-28 14:36:10,490 INFO L226 Difference]: Without dead ends: 3494 [2022-01-28 14:36:10,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:36:10,490 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 280 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:10,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 187 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:36:10,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2022-01-28 14:36:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 2770. [2022-01-28 14:36:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2770 states, 2769 states have (on average 3.6796677500902852) internal successors, (10189), 2769 states have internal predecessors, (10189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 10189 transitions. [2022-01-28 14:36:10,534 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 10189 transitions. Word has length 24 [2022-01-28 14:36:10,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:10,534 INFO L470 AbstractCegarLoop]: Abstraction has 2770 states and 10189 transitions. [2022-01-28 14:36:10,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 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) [2022-01-28 14:36:10,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 10189 transitions. [2022-01-28 14:36:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:10,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:10,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:10,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:10,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:10,757 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:10,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2054099859, now seen corresponding path program 3 times [2022-01-28 14:36:10,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:10,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54428642] [2022-01-28 14:36:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:10,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:10,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:10,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54428642] [2022-01-28 14:36:10,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54428642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:10,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785815155] [2022-01-28 14:36:10,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:36:10,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:10,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:10,824 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) [2022-01-28 14:36:10,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 14:36:10,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:36:10,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:10,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 14:36:10,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:11,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:11,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:36:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:11,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785815155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:11,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:11,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2022-01-28 14:36:11,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324822001] [2022-01-28 14:36:11,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:11,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:36:11,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:11,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:36:11,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:36:11,456 INFO L87 Difference]: Start difference. First operand 2770 states and 10189 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 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) [2022-01-28 14:36:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:15,167 INFO L93 Difference]: Finished difference Result 15344 states and 53305 transitions. [2022-01-28 14:36:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-28 14:36:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 14:36:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:15,197 INFO L225 Difference]: With dead ends: 15344 [2022-01-28 14:36:15,197 INFO L226 Difference]: Without dead ends: 11515 [2022-01-28 14:36:15,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4963 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2342, Invalid=12664, Unknown=0, NotChecked=0, Total=15006 [2022-01-28 14:36:15,200 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 1073 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 4659 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 4811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 4659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:15,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 1518 Invalid, 4811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 4659 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 14:36:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11515 states. [2022-01-28 14:36:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11515 to 5300. [2022-01-28 14:36:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5300 states, 5299 states have (on average 3.811851292696735) internal successors, (20199), 5299 states have internal predecessors, (20199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5300 states to 5300 states and 20199 transitions. [2022-01-28 14:36:15,344 INFO L78 Accepts]: Start accepts. Automaton has 5300 states and 20199 transitions. Word has length 27 [2022-01-28 14:36:15,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:15,345 INFO L470 AbstractCegarLoop]: Abstraction has 5300 states and 20199 transitions. [2022-01-28 14:36:15,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 22 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) [2022-01-28 14:36:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 5300 states and 20199 transitions. [2022-01-28 14:36:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:15,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:15,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:15,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:15,563 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,SelfDestructingSolverStorable25 [2022-01-28 14:36:15,563 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash -719511607, now seen corresponding path program 1 times [2022-01-28 14:36:15,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:15,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635411109] [2022-01-28 14:36:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:15,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:15,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:15,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635411109] [2022-01-28 14:36:15,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635411109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:15,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872344380] [2022-01-28 14:36:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:15,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:15,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:15,619 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) [2022-01-28 14:36:15,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-28 14:36:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:15,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:36:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:15,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:36:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:15,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:15,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:15,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:36:15,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:15,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:15,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:15,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:15,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872344380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:15,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:15,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-28 14:36:15,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606626854] [2022-01-28 14:36:15,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:15,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 14:36:15,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:15,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 14:36:15,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:15,854 INFO L87 Difference]: Start difference. First operand 5300 states and 20199 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-28 14:36:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:16,025 INFO L93 Difference]: Finished difference Result 7207 states and 26780 transitions. [2022-01-28 14:36:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:36:16,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 27 [2022-01-28 14:36:16,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:16,044 INFO L225 Difference]: With dead ends: 7207 [2022-01-28 14:36:16,044 INFO L226 Difference]: Without dead ends: 6969 [2022-01-28 14:36:16,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:36:16,044 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 162 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:16,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 119 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6969 states. [2022-01-28 14:36:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6969 to 6099. [2022-01-28 14:36:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 6098 states have (on average 3.791571006887504) internal successors, (23121), 6098 states have internal predecessors, (23121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 23121 transitions. [2022-01-28 14:36:16,209 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 23121 transitions. Word has length 27 [2022-01-28 14:36:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:16,209 INFO L470 AbstractCegarLoop]: Abstraction has 6099 states and 23121 transitions. [2022-01-28 14:36:16,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-28 14:36:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 23121 transitions. [2022-01-28 14:36:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:16,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:16,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:16,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:16,435 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,SelfDestructingSolverStorable26 [2022-01-28 14:36:16,435 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash 874695761, now seen corresponding path program 4 times [2022-01-28 14:36:16,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:16,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035787703] [2022-01-28 14:36:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:16,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:16,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:16,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035787703] [2022-01-28 14:36:16,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035787703] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:16,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647933785] [2022-01-28 14:36:16,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:36:16,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:16,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:16,496 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) [2022-01-28 14:36:16,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-28 14:36:16,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:36:16,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:16,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:36:16,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:16,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:16,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:36:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:16,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647933785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:16,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:16,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 9 [2022-01-28 14:36:16,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099204510] [2022-01-28 14:36:16,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:16,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 14:36:16,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:16,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 14:36:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:16,675 INFO L87 Difference]: Start difference. First operand 6099 states and 23121 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-01-28 14:36:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:16,842 INFO L93 Difference]: Finished difference Result 12007 states and 44247 transitions. [2022-01-28 14:36:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:36:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 27 [2022-01-28 14:36:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:16,874 INFO L225 Difference]: With dead ends: 12007 [2022-01-28 14:36:16,874 INFO L226 Difference]: Without dead ends: 11371 [2022-01-28 14:36:16,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-01-28 14:36:16,878 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 239 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:16,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 268 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11371 states. [2022-01-28 14:36:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11371 to 6822. [2022-01-28 14:36:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 3.8425450813663686) internal successors, (26210), 6821 states have internal predecessors, (26210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 26210 transitions. [2022-01-28 14:36:17,208 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 26210 transitions. Word has length 27 [2022-01-28 14:36:17,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:17,208 INFO L470 AbstractCegarLoop]: Abstraction has 6822 states and 26210 transitions. [2022-01-28 14:36:17,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2022-01-28 14:36:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 26210 transitions. [2022-01-28 14:36:17,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:17,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:17,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:17,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:17,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-28 14:36:17,435 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1192875703, now seen corresponding path program 5 times [2022-01-28 14:36:17,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:17,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48456447] [2022-01-28 14:36:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:17,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:17,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:17,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48456447] [2022-01-28 14:36:17,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48456447] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:17,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491813424] [2022-01-28 14:36:17,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:36:17,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:17,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:17,524 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) [2022-01-28 14:36:17,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-28 14:36:17,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:36:17,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:17,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:36:17,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:17,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:36:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:17,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491813424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:17,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:17,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 11 [2022-01-28 14:36:17,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519398373] [2022-01-28 14:36:17,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:17,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 14:36:17,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 14:36:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-28 14:36:17,684 INFO L87 Difference]: Start difference. First operand 6822 states and 26210 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2022-01-28 14:36:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:17,856 INFO L93 Difference]: Finished difference Result 10691 states and 39400 transitions. [2022-01-28 14:36:17,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:36:17,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 14:36:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:17,879 INFO L225 Difference]: With dead ends: 10691 [2022-01-28 14:36:17,880 INFO L226 Difference]: Without dead ends: 9957 [2022-01-28 14:36:17,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:36:17,887 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 182 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:17,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 286 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9957 states. [2022-01-28 14:36:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9957 to 6855. [2022-01-28 14:36:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6855 states, 6854 states have (on average 3.824044353662095) internal successors, (26210), 6854 states have internal predecessors, (26210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 26210 transitions. [2022-01-28 14:36:18,055 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 26210 transitions. Word has length 27 [2022-01-28 14:36:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:18,055 INFO L470 AbstractCegarLoop]: Abstraction has 6855 states and 26210 transitions. [2022-01-28 14:36:18,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 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) [2022-01-28 14:36:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 26210 transitions. [2022-01-28 14:36:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:18,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:18,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:18,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:18,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:18,285 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:18,285 INFO L85 PathProgramCache]: Analyzing trace with hash -144799379, now seen corresponding path program 6 times [2022-01-28 14:36:18,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:18,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533180452] [2022-01-28 14:36:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:18,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:18,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:18,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533180452] [2022-01-28 14:36:18,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533180452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:18,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321035100] [2022-01-28 14:36:18,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:36:18,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:18,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:18,347 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) [2022-01-28 14:36:18,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-28 14:36:18,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 14:36:18,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:18,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:36:18,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:18,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:18,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:36:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:18,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321035100] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:18,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:18,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-01-28 14:36:18,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701320302] [2022-01-28 14:36:18,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:18,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:36:18,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:18,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:36:18,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:36:18,487 INFO L87 Difference]: Start difference. First operand 6855 states and 26210 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2022-01-28 14:36:18,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:18,665 INFO L93 Difference]: Finished difference Result 11732 states and 43817 transitions. [2022-01-28 14:36:18,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:36:18,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 27 [2022-01-28 14:36:18,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:18,696 INFO L225 Difference]: With dead ends: 11732 [2022-01-28 14:36:18,696 INFO L226 Difference]: Without dead ends: 11351 [2022-01-28 14:36:18,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:36:18,697 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 246 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:18,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 145 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:18,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11351 states. [2022-01-28 14:36:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11351 to 8024. [2022-01-28 14:36:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8024 states, 8023 states have (on average 3.9000373924965723) internal successors, (31290), 8023 states have internal predecessors, (31290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:18,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8024 states to 8024 states and 31290 transitions. [2022-01-28 14:36:18,918 INFO L78 Accepts]: Start accepts. Automaton has 8024 states and 31290 transitions. Word has length 27 [2022-01-28 14:36:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:18,918 INFO L470 AbstractCegarLoop]: Abstraction has 8024 states and 31290 transitions. [2022-01-28 14:36:18,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2022-01-28 14:36:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 8024 states and 31290 transitions. [2022-01-28 14:36:18,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:18,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:18,935 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:18,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-28 14:36:19,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:19,151 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:19,152 INFO L85 PathProgramCache]: Analyzing trace with hash 173380563, now seen corresponding path program 7 times [2022-01-28 14:36:19,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:19,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196362853] [2022-01-28 14:36:19,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:19,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:19,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:19,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196362853] [2022-01-28 14:36:19,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196362853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:19,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044437263] [2022-01-28 14:36:19,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:36:19,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:19,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:19,195 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) [2022-01-28 14:36:19,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-28 14:36:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:19,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:36:19,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:19,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:19,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:36:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:19,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044437263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:19,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:19,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-28 14:36:19,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035338089] [2022-01-28 14:36:19,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:19,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 14:36:19,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:19,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 14:36:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:36:19,450 INFO L87 Difference]: Start difference. First operand 8024 states and 31290 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2022-01-28 14:36:19,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:19,597 INFO L93 Difference]: Finished difference Result 11702 states and 43501 transitions. [2022-01-28 14:36:19,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 14:36:19,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 14:36:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:19,625 INFO L225 Difference]: With dead ends: 11702 [2022-01-28 14:36:19,625 INFO L226 Difference]: Without dead ends: 11257 [2022-01-28 14:36:19,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:36:19,626 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 140 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:19,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 131 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2022-01-28 14:36:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 8003. [2022-01-28 14:36:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8003 states, 8002 states have (on average 3.8975256185953513) internal successors, (31188), 8002 states have internal predecessors, (31188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8003 states to 8003 states and 31188 transitions. [2022-01-28 14:36:19,857 INFO L78 Accepts]: Start accepts. Automaton has 8003 states and 31188 transitions. Word has length 27 [2022-01-28 14:36:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:19,857 INFO L470 AbstractCegarLoop]: Abstraction has 8003 states and 31188 transitions. [2022-01-28 14:36:19,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 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) [2022-01-28 14:36:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 8003 states and 31188 transitions. [2022-01-28 14:36:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:19,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:19,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:19,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:20,086 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,SelfDestructingSolverStorable30 [2022-01-28 14:36:20,086 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:20,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash -586208403, now seen corresponding path program 8 times [2022-01-28 14:36:20,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:20,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784144785] [2022-01-28 14:36:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:20,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:20,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:20,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784144785] [2022-01-28 14:36:20,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784144785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:20,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570925685] [2022-01-28 14:36:20,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:36:20,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:20,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:20,123 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) [2022-01-28 14:36:20,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-28 14:36:20,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:36:20,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:20,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:36:20,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:20,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:20,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:36:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:20,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570925685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:20,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:20,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-01-28 14:36:20,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17700228] [2022-01-28 14:36:20,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:20,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 14:36:20,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:20,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 14:36:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:36:20,300 INFO L87 Difference]: Start difference. First operand 8003 states and 31188 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:20,443 INFO L93 Difference]: Finished difference Result 11237 states and 42020 transitions. [2022-01-28 14:36:20,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:36:20,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 14:36:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:20,469 INFO L225 Difference]: With dead ends: 11237 [2022-01-28 14:36:20,470 INFO L226 Difference]: Without dead ends: 10762 [2022-01-28 14:36:20,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:36:20,470 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 205 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:20,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 210 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10762 states. [2022-01-28 14:36:20,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10762 to 8335. [2022-01-28 14:36:20,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8335 states, 8334 states have (on average 3.866930645548356) internal successors, (32227), 8334 states have internal predecessors, (32227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8335 states to 8335 states and 32227 transitions. [2022-01-28 14:36:20,667 INFO L78 Accepts]: Start accepts. Automaton has 8335 states and 32227 transitions. Word has length 27 [2022-01-28 14:36:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:20,667 INFO L470 AbstractCegarLoop]: Abstraction has 8335 states and 32227 transitions. [2022-01-28 14:36:20,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:20,668 INFO L276 IsEmpty]: Start isEmpty. Operand 8335 states and 32227 transitions. [2022-01-28 14:36:20,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:20,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:20,684 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:20,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:20,900 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,SelfDestructingSolverStorable31 [2022-01-28 14:36:20,901 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:20,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:20,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1500826025, now seen corresponding path program 1 times [2022-01-28 14:36:20,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:20,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674883302] [2022-01-28 14:36:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:20,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:20,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:20,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:20,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674883302] [2022-01-28 14:36:20,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674883302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:36:20,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:36:20,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 14:36:20,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062322537] [2022-01-28 14:36:20,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:36:20,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 14:36:20,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:20,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 14:36:20,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 14:36:20,920 INFO L87 Difference]: Start difference. First operand 8335 states and 32227 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2022-01-28 14:36:20,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:20,972 INFO L93 Difference]: Finished difference Result 9672 states and 36473 transitions. [2022-01-28 14:36:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 14:36:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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 27 [2022-01-28 14:36:20,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:20,994 INFO L225 Difference]: With dead ends: 9672 [2022-01-28 14:36:20,994 INFO L226 Difference]: Without dead ends: 9622 [2022-01-28 14:36:20,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 14:36:20,995 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:20,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 61 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2022-01-28 14:36:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 8176. [2022-01-28 14:36:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8176 states, 8175 states have (on average 3.8801223241590215) internal successors, (31720), 8175 states have internal predecessors, (31720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 31720 transitions. [2022-01-28 14:36:21,207 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 31720 transitions. Word has length 27 [2022-01-28 14:36:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:21,207 INFO L470 AbstractCegarLoop]: Abstraction has 8176 states and 31720 transitions. [2022-01-28 14:36:21,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2022-01-28 14:36:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 31720 transitions. [2022-01-28 14:36:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:21,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:21,223 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:21,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-28 14:36:21,224 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1265490017, now seen corresponding path program 2 times [2022-01-28 14:36:21,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:21,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505895232] [2022-01-28 14:36:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:21,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:21,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505895232] [2022-01-28 14:36:21,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505895232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991073002] [2022-01-28 14:36:21,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:36:21,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:21,268 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) [2022-01-28 14:36:21,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-28 14:36:21,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:36:21,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:21,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:36:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:21,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:36:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:21,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:21,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:21,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:36:21,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:21,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:21,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:21,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:21,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991073002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:21,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:21,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-01-28 14:36:21,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187721127] [2022-01-28 14:36:21,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:21,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 14:36:21,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 14:36:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:36:21,433 INFO L87 Difference]: Start difference. First operand 8176 states and 31720 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-28 14:36:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:21,581 INFO L93 Difference]: Finished difference Result 9264 states and 34871 transitions. [2022-01-28 14:36:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 14:36:21,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 27 [2022-01-28 14:36:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:21,603 INFO L225 Difference]: With dead ends: 9264 [2022-01-28 14:36:21,603 INFO L226 Difference]: Without dead ends: 9087 [2022-01-28 14:36:21,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:36:21,603 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 101 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:21,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 159 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9087 states. [2022-01-28 14:36:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9087 to 8094. [2022-01-28 14:36:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8094 states, 8093 states have (on average 3.8840973680958855) internal successors, (31434), 8093 states have internal predecessors, (31434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8094 states to 8094 states and 31434 transitions. [2022-01-28 14:36:21,752 INFO L78 Accepts]: Start accepts. Automaton has 8094 states and 31434 transitions. Word has length 27 [2022-01-28 14:36:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:21,752 INFO L470 AbstractCegarLoop]: Abstraction has 8094 states and 31434 transitions. [2022-01-28 14:36:21,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2022-01-28 14:36:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 8094 states and 31434 transitions. [2022-01-28 14:36:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:21,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:21,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:21,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:21,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:21,982 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:21,982 INFO L85 PathProgramCache]: Analyzing trace with hash -19220799, now seen corresponding path program 3 times [2022-01-28 14:36:21,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:21,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636958239] [2022-01-28 14:36:21,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:21,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:22,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:22,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636958239] [2022-01-28 14:36:22,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636958239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:22,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66503290] [2022-01-28 14:36:22,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:36:22,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:22,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:22,045 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) [2022-01-28 14:36:22,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-28 14:36:22,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:36:22,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:22,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:36:22,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:22,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:36:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:22,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:22,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:22,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:36:22,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:22,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:22,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:22,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:36:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:22,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66503290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:22,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:22,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-01-28 14:36:22,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138374844] [2022-01-28 14:36:22,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:22,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 14:36:22,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:22,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 14:36:22,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:36:22,307 INFO L87 Difference]: Start difference. First operand 8094 states and 31434 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2022-01-28 14:36:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:22,539 INFO L93 Difference]: Finished difference Result 8720 states and 33494 transitions. [2022-01-28 14:36:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:36:22,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 14:36:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:22,560 INFO L225 Difference]: With dead ends: 8720 [2022-01-28 14:36:22,560 INFO L226 Difference]: Without dead ends: 8720 [2022-01-28 14:36:22,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-28 14:36:22,560 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:22,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 160 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8720 states. [2022-01-28 14:36:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8720 to 7844. [2022-01-28 14:36:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7844 states, 7843 states have (on average 3.8797653958944283) internal successors, (30429), 7843 states have internal predecessors, (30429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:22,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7844 states to 7844 states and 30429 transitions. [2022-01-28 14:36:22,703 INFO L78 Accepts]: Start accepts. Automaton has 7844 states and 30429 transitions. Word has length 27 [2022-01-28 14:36:22,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:22,703 INFO L470 AbstractCegarLoop]: Abstraction has 7844 states and 30429 transitions. [2022-01-28 14:36:22,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2022-01-28 14:36:22,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7844 states and 30429 transitions. [2022-01-28 14:36:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:22,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:22,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:22,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:22,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:22,933 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:22,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:22,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2068589027, now seen corresponding path program 4 times [2022-01-28 14:36:22,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:22,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276731122] [2022-01-28 14:36:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:22,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:22,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:22,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276731122] [2022-01-28 14:36:22,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276731122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:36:22,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:36:22,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:36:22,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52099520] [2022-01-28 14:36:22,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:36:22,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:36:22,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:22,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:36:22,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:36:22,979 INFO L87 Difference]: Start difference. First operand 7844 states and 30429 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:23,065 INFO L93 Difference]: Finished difference Result 7690 states and 29836 transitions. [2022-01-28 14:36:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:36:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 14:36:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:23,082 INFO L225 Difference]: With dead ends: 7690 [2022-01-28 14:36:23,082 INFO L226 Difference]: Without dead ends: 7690 [2022-01-28 14:36:23,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:36:23,083 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:23,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 32 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:36:23,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7690 states. [2022-01-28 14:36:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7690 to 7690. [2022-01-28 14:36:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.8803485498764467) internal successors, (29836), 7689 states have internal predecessors, (29836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 29836 transitions. [2022-01-28 14:36:23,215 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 29836 transitions. Word has length 27 [2022-01-28 14:36:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:23,215 INFO L470 AbstractCegarLoop]: Abstraction has 7690 states and 29836 transitions. [2022-01-28 14:36:23,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 29836 transitions. [2022-01-28 14:36:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 14:36:23,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:23,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:23,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-28 14:36:23,230 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:23,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:23,231 INFO L85 PathProgramCache]: Analyzing trace with hash -740813211, now seen corresponding path program 5 times [2022-01-28 14:36:23,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:23,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993531079] [2022-01-28 14:36:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:23,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:23,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:23,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993531079] [2022-01-28 14:36:23,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993531079] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:36:23,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:36:23,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 14:36:23,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494095838] [2022-01-28 14:36:23,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:36:23,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:36:23,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:23,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:36:23,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:36:23,283 INFO L87 Difference]: Start difference. First operand 7690 states and 29836 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2022-01-28 14:36:23,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:23,424 INFO L93 Difference]: Finished difference Result 7532 states and 29153 transitions. [2022-01-28 14:36:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 14:36:23,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 27 [2022-01-28 14:36:23,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:23,442 INFO L225 Difference]: With dead ends: 7532 [2022-01-28 14:36:23,442 INFO L226 Difference]: Without dead ends: 7360 [2022-01-28 14:36:23,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:36:23,443 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:23,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 52 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:36:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7360 states. [2022-01-28 14:36:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7360 to 7360. [2022-01-28 14:36:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7360 states, 7359 states have (on average 3.900529963310232) internal successors, (28704), 7359 states have internal predecessors, (28704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7360 states to 7360 states and 28704 transitions. [2022-01-28 14:36:23,590 INFO L78 Accepts]: Start accepts. Automaton has 7360 states and 28704 transitions. Word has length 27 [2022-01-28 14:36:23,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:23,591 INFO L470 AbstractCegarLoop]: Abstraction has 7360 states and 28704 transitions. [2022-01-28 14:36:23,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2022-01-28 14:36:23,591 INFO L276 IsEmpty]: Start isEmpty. Operand 7360 states and 28704 transitions. [2022-01-28 14:36:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:36:23,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:23,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:23,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-28 14:36:23,605 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:23,605 INFO L85 PathProgramCache]: Analyzing trace with hash -461124344, now seen corresponding path program 9 times [2022-01-28 14:36:23,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:23,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854000841] [2022-01-28 14:36:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:23,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:23,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:23,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854000841] [2022-01-28 14:36:23,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854000841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:23,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848847597] [2022-01-28 14:36:23,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:36:23,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:23,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:23,673 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) [2022-01-28 14:36:23,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-28 14:36:23,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:36:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:36:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:36:23,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:36:24,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848847597] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:24,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:24,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2022-01-28 14:36:24,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972529971] [2022-01-28 14:36:24,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:24,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:36:24,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:36:24,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:36:24,099 INFO L87 Difference]: Start difference. First operand 7360 states and 28704 transitions. Second operand has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 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) [2022-01-28 14:36:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:25,274 INFO L93 Difference]: Finished difference Result 22955 states and 87500 transitions. [2022-01-28 14:36:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-28 14:36:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 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) Word has length 30 [2022-01-28 14:36:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:25,358 INFO L225 Difference]: With dead ends: 22955 [2022-01-28 14:36:25,358 INFO L226 Difference]: Without dead ends: 22289 [2022-01-28 14:36:25,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=456, Invalid=1800, Unknown=0, NotChecked=0, Total=2256 [2022-01-28 14:36:25,359 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 556 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:25,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 502 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:36:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22289 states. [2022-01-28 14:36:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22289 to 13833. [2022-01-28 14:36:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13833 states, 13832 states have (on average 4.011784268363216) internal successors, (55491), 13832 states have internal predecessors, (55491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13833 states to 13833 states and 55491 transitions. [2022-01-28 14:36:25,811 INFO L78 Accepts]: Start accepts. Automaton has 13833 states and 55491 transitions. Word has length 30 [2022-01-28 14:36:25,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:25,812 INFO L470 AbstractCegarLoop]: Abstraction has 13833 states and 55491 transitions. [2022-01-28 14:36:25,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.857142857142857) internal successors, (81), 20 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) [2022-01-28 14:36:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 13833 states and 55491 transitions. [2022-01-28 14:36:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:36:25,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:25,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:25,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-28 14:36:26,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-28 14:36:26,050 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1428684140, now seen corresponding path program 10 times [2022-01-28 14:36:26,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:26,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594044627] [2022-01-28 14:36:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:26,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:26,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:26,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594044627] [2022-01-28 14:36:26,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594044627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:26,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460596595] [2022-01-28 14:36:26,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:36:26,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:26,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:26,143 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) [2022-01-28 14:36:26,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-28 14:36:26,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:36:26,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:26,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 14:36:26,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:26,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:36:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:26,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:26,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:26,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:36:26,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:26,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-28 14:36:26,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:26,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-28 14:36:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:26,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460596595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:26,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:26,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-01-28 14:36:26,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241977359] [2022-01-28 14:36:26,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:26,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:36:26,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:26,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:36:26,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:36:26,633 INFO L87 Difference]: Start difference. First operand 13833 states and 55491 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 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) [2022-01-28 14:36:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:28,615 INFO L93 Difference]: Finished difference Result 25354 states and 97063 transitions. [2022-01-28 14:36:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-28 14:36:28,615 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 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) Word has length 30 [2022-01-28 14:36:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:28,689 INFO L225 Difference]: With dead ends: 25354 [2022-01-28 14:36:28,689 INFO L226 Difference]: Without dead ends: 24401 [2022-01-28 14:36:28,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=413, Invalid=2557, Unknown=0, NotChecked=0, Total=2970 [2022-01-28 14:36:28,690 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 591 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 3086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:28,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 832 Invalid, 3086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 14:36:28,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24401 states. [2022-01-28 14:36:29,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24401 to 15204. [2022-01-28 14:36:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15204 states, 15203 states have (on average 3.982437676774321) internal successors, (60545), 15203 states have internal predecessors, (60545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:29,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15204 states to 15204 states and 60545 transitions. [2022-01-28 14:36:29,071 INFO L78 Accepts]: Start accepts. Automaton has 15204 states and 60545 transitions. Word has length 30 [2022-01-28 14:36:29,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:29,072 INFO L470 AbstractCegarLoop]: Abstraction has 15204 states and 60545 transitions. [2022-01-28 14:36:29,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 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) [2022-01-28 14:36:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 15204 states and 60545 transitions. [2022-01-28 14:36:29,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:36:29,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:29,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:29,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-28 14:36:29,312 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,SelfDestructingSolverStorable38 [2022-01-28 14:36:29,312 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:29,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1766374196, now seen corresponding path program 11 times [2022-01-28 14:36:29,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:29,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906214707] [2022-01-28 14:36:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:29,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:29,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:29,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906214707] [2022-01-28 14:36:29,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906214707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:29,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359051443] [2022-01-28 14:36:29,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:36:29,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:29,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:29,371 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) [2022-01-28 14:36:29,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:36:29,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:29,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-28 14:36:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:36:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:29,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:29,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359051443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:29,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:29,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2022-01-28 14:36:29,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394766528] [2022-01-28 14:36:29,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:29,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 14:36:29,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:29,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 14:36:29,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-28 14:36:29,646 INFO L87 Difference]: Start difference. First operand 15204 states and 60545 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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) [2022-01-28 14:36:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:30,086 INFO L93 Difference]: Finished difference Result 22758 states and 90020 transitions. [2022-01-28 14:36:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:36:30,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 14:36:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:30,154 INFO L225 Difference]: With dead ends: 22758 [2022-01-28 14:36:30,155 INFO L226 Difference]: Without dead ends: 22730 [2022-01-28 14:36:30,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:36:30,155 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 201 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:30,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 174 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:36:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22730 states. [2022-01-28 14:36:30,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22730 to 16009. [2022-01-28 14:36:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 4.006246876561719) internal successors, (64132), 16008 states have internal predecessors, (64132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 64132 transitions. [2022-01-28 14:36:30,542 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 64132 transitions. Word has length 30 [2022-01-28 14:36:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:30,542 INFO L470 AbstractCegarLoop]: Abstraction has 16009 states and 64132 transitions. [2022-01-28 14:36:30,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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) [2022-01-28 14:36:30,542 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 64132 transitions. [2022-01-28 14:36:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:36:30,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:30,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:30,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:30,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-28 14:36:30,784 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:30,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1144493786, now seen corresponding path program 12 times [2022-01-28 14:36:30,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:30,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451248013] [2022-01-28 14:36:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:30,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:30,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451248013] [2022-01-28 14:36:30,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451248013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:30,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45684434] [2022-01-28 14:36:30,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:36:30,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:30,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:30,855 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) [2022-01-28 14:36:30,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-28 14:36:30,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:36:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:30,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:36:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:36:30,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:36:31,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45684434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:31,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:31,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-28 14:36:31,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073734221] [2022-01-28 14:36:31,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:31,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:36:31,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:31,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:36:31,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:36:31,166 INFO L87 Difference]: Start difference. First operand 16009 states and 64132 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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) [2022-01-28 14:36:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:31,805 INFO L93 Difference]: Finished difference Result 28320 states and 110538 transitions. [2022-01-28 14:36:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 14:36:31,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 14:36:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:31,894 INFO L225 Difference]: With dead ends: 28320 [2022-01-28 14:36:31,894 INFO L226 Difference]: Without dead ends: 27743 [2022-01-28 14:36:31,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:36:31,895 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 571 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:31,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 242 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:36:31,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27743 states. [2022-01-28 14:36:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27743 to 18832. [2022-01-28 14:36:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18832 states, 18831 states have (on average 4.057883277574213) internal successors, (76414), 18831 states have internal predecessors, (76414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18832 states to 18832 states and 76414 transitions. [2022-01-28 14:36:32,469 INFO L78 Accepts]: Start accepts. Automaton has 18832 states and 76414 transitions. Word has length 30 [2022-01-28 14:36:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:32,469 INFO L470 AbstractCegarLoop]: Abstraction has 18832 states and 76414 transitions. [2022-01-28 14:36:32,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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) [2022-01-28 14:36:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 18832 states and 76414 transitions. [2022-01-28 14:36:32,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:36:32,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:32,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:32,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:32,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:32,715 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:32,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1045458162, now seen corresponding path program 13 times [2022-01-28 14:36:32,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:32,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459687222] [2022-01-28 14:36:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:32,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:32,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:32,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459687222] [2022-01-28 14:36:32,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459687222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:32,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627635498] [2022-01-28 14:36:32,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:36:32,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:32,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:32,761 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) [2022-01-28 14:36:32,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-28 14:36:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:32,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 14:36:32,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:32,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:36:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:32,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:32,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:32,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:36:33,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:33,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-28 14:36:33,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:33,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-28 14:36:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:33,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627635498] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:33,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:33,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2022-01-28 14:36:33,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724626336] [2022-01-28 14:36:33,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:33,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:36:33,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:33,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:36:33,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:36:33,147 INFO L87 Difference]: Start difference. First operand 18832 states and 76414 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 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) [2022-01-28 14:36:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:34,492 INFO L93 Difference]: Finished difference Result 27899 states and 109410 transitions. [2022-01-28 14:36:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-28 14:36:34,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 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) Word has length 30 [2022-01-28 14:36:34,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:34,572 INFO L225 Difference]: With dead ends: 27899 [2022-01-28 14:36:34,572 INFO L226 Difference]: Without dead ends: 27038 [2022-01-28 14:36:34,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=384, Invalid=2478, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 14:36:34,573 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 516 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 3079 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 3125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:34,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 891 Invalid, 3125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3079 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:36:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27038 states. [2022-01-28 14:36:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27038 to 19335. [2022-01-28 14:36:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19335 states, 19334 states have (on average 4.045463949518982) internal successors, (78215), 19334 states have internal predecessors, (78215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19335 states to 19335 states and 78215 transitions. [2022-01-28 14:36:35,074 INFO L78 Accepts]: Start accepts. Automaton has 19335 states and 78215 transitions. Word has length 30 [2022-01-28 14:36:35,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:35,075 INFO L470 AbstractCegarLoop]: Abstraction has 19335 states and 78215 transitions. [2022-01-28 14:36:35,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 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) [2022-01-28 14:36:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 19335 states and 78215 transitions. [2022-01-28 14:36:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:36:35,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:35,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:35,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:35,323 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,SelfDestructingSolverStorable41 [2022-01-28 14:36:35,323 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1984561458, now seen corresponding path program 1 times [2022-01-28 14:36:35,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:35,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202393537] [2022-01-28 14:36:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:35,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:35,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:35,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202393537] [2022-01-28 14:36:35,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202393537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:35,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218016838] [2022-01-28 14:36:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:35,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:35,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:35,412 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) [2022-01-28 14:36:35,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-28 14:36:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:36:35,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:35,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:35,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:35,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:36:35,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:35,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:36:35,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:35,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:36:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:36,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218016838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:36,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:36,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2022-01-28 14:36:36,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998255478] [2022-01-28 14:36:36,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:36,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:36:36,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:36:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:36:36,020 INFO L87 Difference]: Start difference. First operand 19335 states and 78215 transitions. Second operand has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 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) [2022-01-28 14:36:38,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:38,645 INFO L93 Difference]: Finished difference Result 30338 states and 117072 transitions. [2022-01-28 14:36:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-28 14:36:38,646 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 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) Word has length 30 [2022-01-28 14:36:38,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:38,744 INFO L225 Difference]: With dead ends: 30338 [2022-01-28 14:36:38,744 INFO L226 Difference]: Without dead ends: 28916 [2022-01-28 14:36:38,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=820, Invalid=4730, Unknown=0, NotChecked=0, Total=5550 [2022-01-28 14:36:38,754 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 604 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 3643 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:38,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 1121 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3643 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 14:36:38,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28916 states. [2022-01-28 14:36:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28916 to 19265. [2022-01-28 14:36:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19265 states, 19264 states have (on average 4.046875) internal successors, (77959), 19264 states have internal predecessors, (77959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19265 states to 19265 states and 77959 transitions. [2022-01-28 14:36:39,407 INFO L78 Accepts]: Start accepts. Automaton has 19265 states and 77959 transitions. Word has length 30 [2022-01-28 14:36:39,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:39,408 INFO L470 AbstractCegarLoop]: Abstraction has 19265 states and 77959 transitions. [2022-01-28 14:36:39,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 23 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) [2022-01-28 14:36:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 19265 states and 77959 transitions. [2022-01-28 14:36:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:36:39,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:39,444 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:39,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:39,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:39,660 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:39,660 INFO L85 PathProgramCache]: Analyzing trace with hash 918381320, now seen corresponding path program 14 times [2022-01-28 14:36:39,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:39,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810632030] [2022-01-28 14:36:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:39,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:39,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:39,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810632030] [2022-01-28 14:36:39,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810632030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:39,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972428233] [2022-01-28 14:36:39,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:36:39,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:39,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:39,756 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) [2022-01-28 14:36:39,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-28 14:36:39,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:36:39,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:39,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 14:36:39,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:39,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:40,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972428233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:40,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:40,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2022-01-28 14:36:40,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890136077] [2022-01-28 14:36:40,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:40,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:36:40,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:40,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:36:40,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:36:40,141 INFO L87 Difference]: Start difference. First operand 19265 states and 77959 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 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) [2022-01-28 14:36:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:42,084 INFO L93 Difference]: Finished difference Result 44625 states and 170938 transitions. [2022-01-28 14:36:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-28 14:36:42,085 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 14:36:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:42,255 INFO L225 Difference]: With dead ends: 44625 [2022-01-28 14:36:42,255 INFO L226 Difference]: Without dead ends: 42997 [2022-01-28 14:36:42,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=886, Invalid=3670, Unknown=0, NotChecked=0, Total=4556 [2022-01-28 14:36:42,257 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 835 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 2590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:42,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 878 Invalid, 2590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 14:36:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42997 states. [2022-01-28 14:36:43,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42997 to 24301. [2022-01-28 14:36:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24301 states, 24300 states have (on average 4.098971193415638) internal successors, (99605), 24300 states have internal predecessors, (99605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24301 states to 24301 states and 99605 transitions. [2022-01-28 14:36:43,544 INFO L78 Accepts]: Start accepts. Automaton has 24301 states and 99605 transitions. Word has length 30 [2022-01-28 14:36:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:43,545 INFO L470 AbstractCegarLoop]: Abstraction has 24301 states and 99605 transitions. [2022-01-28 14:36:43,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 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) [2022-01-28 14:36:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 24301 states and 99605 transitions. [2022-01-28 14:36:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:36:43,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:43,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:43,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:43,808 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,SelfDestructingSolverStorable43 [2022-01-28 14:36:43,808 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:43,809 INFO L85 PathProgramCache]: Analyzing trace with hash 296500910, now seen corresponding path program 15 times [2022-01-28 14:36:43,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:43,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201788489] [2022-01-28 14:36:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:43,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:43,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:43,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201788489] [2022-01-28 14:36:43,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201788489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:43,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98726820] [2022-01-28 14:36:43,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:36:43,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:43,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:43,897 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) [2022-01-28 14:36:43,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-28 14:36:43,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:36:43,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:43,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:36:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:44,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:44,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98726820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:44,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:44,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-28 14:36:44,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87537241] [2022-01-28 14:36:44,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:44,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:36:44,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:36:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:36:44,294 INFO L87 Difference]: Start difference. First operand 24301 states and 99605 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 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) [2022-01-28 14:36:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:45,203 INFO L93 Difference]: Finished difference Result 36554 states and 144065 transitions. [2022-01-28 14:36:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:36:45,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 14:36:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:45,410 INFO L225 Difference]: With dead ends: 36554 [2022-01-28 14:36:45,411 INFO L226 Difference]: Without dead ends: 35826 [2022-01-28 14:36:45,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:36:45,411 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 508 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:45,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 383 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:36:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35826 states. [2022-01-28 14:36:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35826 to 24880. [2022-01-28 14:36:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24880 states, 24879 states have (on average 4.113107440009647) internal successors, (102330), 24879 states have internal predecessors, (102330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24880 states to 24880 states and 102330 transitions. [2022-01-28 14:36:46,291 INFO L78 Accepts]: Start accepts. Automaton has 24880 states and 102330 transitions. Word has length 30 [2022-01-28 14:36:46,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:46,291 INFO L470 AbstractCegarLoop]: Abstraction has 24880 states and 102330 transitions. [2022-01-28 14:36:46,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 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) [2022-01-28 14:36:46,291 INFO L276 IsEmpty]: Start isEmpty. Operand 24880 states and 102330 transitions. [2022-01-28 14:36:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:36:46,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:46,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:46,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:46,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:46,557 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:46,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1426258168, now seen corresponding path program 16 times [2022-01-28 14:36:46,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:46,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786658366] [2022-01-28 14:36:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:46,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:46,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:46,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786658366] [2022-01-28 14:36:46,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786658366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:46,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120292446] [2022-01-28 14:36:46,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:36:46,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:46,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:46,613 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) [2022-01-28 14:36:46,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-28 14:36:46,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:36:46,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 14:36:46,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:46,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:36:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:46,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:46,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:46,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:36:47,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:47,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:36:47,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:47,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:36:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:47,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120292446] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:47,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:47,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-01-28 14:36:47,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445205469] [2022-01-28 14:36:47,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:47,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:36:47,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:47,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:36:47,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:36:47,095 INFO L87 Difference]: Start difference. First operand 24880 states and 102330 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) [2022-01-28 14:36:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:50,150 INFO L93 Difference]: Finished difference Result 55484 states and 210244 transitions. [2022-01-28 14:36:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-28 14:36:50,151 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) Word has length 30 [2022-01-28 14:36:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:50,375 INFO L225 Difference]: With dead ends: 55484 [2022-01-28 14:36:50,376 INFO L226 Difference]: Without dead ends: 51916 [2022-01-28 14:36:50,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4171 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1415, Invalid=11017, Unknown=0, NotChecked=0, Total=12432 [2022-01-28 14:36:50,379 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1150 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 3843 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 3944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 3843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:50,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1150 Valid, 1346 Invalid, 3944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 3843 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 14:36:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51916 states. [2022-01-28 14:36:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51916 to 26647. [2022-01-28 14:36:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26647 states, 26646 states have (on average 4.111611498911657) internal successors, (109558), 26646 states have internal predecessors, (109558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26647 states to 26647 states and 109558 transitions. [2022-01-28 14:36:51,722 INFO L78 Accepts]: Start accepts. Automaton has 26647 states and 109558 transitions. Word has length 30 [2022-01-28 14:36:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:51,722 INFO L470 AbstractCegarLoop]: Abstraction has 26647 states and 109558 transitions. [2022-01-28 14:36:51,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) [2022-01-28 14:36:51,723 INFO L276 IsEmpty]: Start isEmpty. Operand 26647 states and 109558 transitions. [2022-01-28 14:36:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:36:51,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:51,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:51,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:51,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-28 14:36:51,991 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1212441790, now seen corresponding path program 17 times [2022-01-28 14:36:51,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:51,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836013068] [2022-01-28 14:36:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:51,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:52,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:52,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836013068] [2022-01-28 14:36:52,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836013068] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:52,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041212004] [2022-01-28 14:36:52,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:36:52,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:52,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:52,236 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) [2022-01-28 14:36:52,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-28 14:36:52,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:36:52,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:36:52,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:36:52,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:52,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:36:52,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041212004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:52,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:52,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-01-28 14:36:52,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362407992] [2022-01-28 14:36:52,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:52,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:36:52,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:52,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:36:52,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:36:52,634 INFO L87 Difference]: Start difference. First operand 26647 states and 109558 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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) [2022-01-28 14:36:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:36:54,023 INFO L93 Difference]: Finished difference Result 69453 states and 279353 transitions. [2022-01-28 14:36:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 14:36:54,023 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 14:36:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:36:54,325 INFO L225 Difference]: With dead ends: 69453 [2022-01-28 14:36:54,325 INFO L226 Difference]: Without dead ends: 68598 [2022-01-28 14:36:54,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=984, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:36:54,326 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 559 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:36:54,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 433 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:36:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68598 states. [2022-01-28 14:36:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68598 to 42417. [2022-01-28 14:36:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42417 states, 42416 states have (on average 4.229818936250472) internal successors, (179412), 42416 states have internal predecessors, (179412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:36:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42417 states to 42417 states and 179412 transitions. [2022-01-28 14:36:56,256 INFO L78 Accepts]: Start accepts. Automaton has 42417 states and 179412 transitions. Word has length 30 [2022-01-28 14:36:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:36:56,256 INFO L470 AbstractCegarLoop]: Abstraction has 42417 states and 179412 transitions. [2022-01-28 14:36:56,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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) [2022-01-28 14:36:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 42417 states and 179412 transitions. [2022-01-28 14:36:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:36:56,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:36:56,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:36:56,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-28 14:36:56,597 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,SelfDestructingSolverStorable46 [2022-01-28 14:36:56,597 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:36:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:36:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1300393330, now seen corresponding path program 1 times [2022-01-28 14:36:56,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:36:56,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572138103] [2022-01-28 14:36:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:56,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:36:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:56,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:36:56,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572138103] [2022-01-28 14:36:56,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572138103] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:36:56,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492100893] [2022-01-28 14:36:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:36:56,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:36:56,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:36:56,649 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) [2022-01-28 14:36:56,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-28 14:36:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:36:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:36:56,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:36:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:36:56,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:36:57,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:57,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:36:57,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:57,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-28 14:36:57,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:36:57,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-28 14:36:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:36:57,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492100893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:36:57,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:36:57,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2022-01-28 14:36:57,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245861884] [2022-01-28 14:36:57,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:36:57,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:36:57,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:36:57,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:36:57,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:36:57,249 INFO L87 Difference]: Start difference. First operand 42417 states and 179412 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) [2022-01-28 14:37:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:00,688 INFO L93 Difference]: Finished difference Result 58914 states and 236481 transitions. [2022-01-28 14:37:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-28 14:37:00,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) Word has length 30 [2022-01-28 14:37:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:01,127 INFO L225 Difference]: With dead ends: 58914 [2022-01-28 14:37:01,127 INFO L226 Difference]: Without dead ends: 56127 [2022-01-28 14:37:01,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3289 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1299, Invalid=8403, Unknown=0, NotChecked=0, Total=9702 [2022-01-28 14:37:01,129 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1357 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 2747 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:01,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 912 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2747 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-28 14:37:01,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56127 states. [2022-01-28 14:37:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56127 to 43337. [2022-01-28 14:37:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43337 states, 43336 states have (on average 4.222101716817426) internal successors, (182969), 43336 states have internal predecessors, (182969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43337 states to 43337 states and 182969 transitions. [2022-01-28 14:37:02,824 INFO L78 Accepts]: Start accepts. Automaton has 43337 states and 182969 transitions. Word has length 30 [2022-01-28 14:37:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:02,824 INFO L470 AbstractCegarLoop]: Abstraction has 43337 states and 182969 transitions. [2022-01-28 14:37:02,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 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) [2022-01-28 14:37:02,824 INFO L276 IsEmpty]: Start isEmpty. Operand 43337 states and 182969 transitions. [2022-01-28 14:37:02,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:37:02,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:02,896 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:02,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:03,100 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,SelfDestructingSolverStorable47 [2022-01-28 14:37:03,100 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:37:03,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:03,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1543737064, now seen corresponding path program 18 times [2022-01-28 14:37:03,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:03,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515331867] [2022-01-28 14:37:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:03,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:03,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:03,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515331867] [2022-01-28 14:37:03,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515331867] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:03,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454121312] [2022-01-28 14:37:03,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:37:03,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:03,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:03,176 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) [2022-01-28 14:37:03,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-28 14:37:03,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:37:03,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:03,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:37:03,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:03,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:03,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454121312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:03,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:03,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-01-28 14:37:03,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307567093] [2022-01-28 14:37:03,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:03,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:37:03,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:37:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:37:03,624 INFO L87 Difference]: Start difference. First operand 43337 states and 182969 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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) [2022-01-28 14:37:04,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:04,932 INFO L93 Difference]: Finished difference Result 69905 states and 281636 transitions. [2022-01-28 14:37:04,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-28 14:37:04,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 14:37:04,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:05,294 INFO L225 Difference]: With dead ends: 69905 [2022-01-28 14:37:05,294 INFO L226 Difference]: Without dead ends: 68764 [2022-01-28 14:37:05,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1571, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 14:37:05,300 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 509 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:05,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 541 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:37:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68764 states. [2022-01-28 14:37:06,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68764 to 42944. [2022-01-28 14:37:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42944 states, 42943 states have (on average 4.21998928812612) internal successors, (181219), 42943 states have internal predecessors, (181219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:07,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42944 states to 42944 states and 181219 transitions. [2022-01-28 14:37:07,367 INFO L78 Accepts]: Start accepts. Automaton has 42944 states and 181219 transitions. Word has length 30 [2022-01-28 14:37:07,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:07,367 INFO L470 AbstractCegarLoop]: Abstraction has 42944 states and 181219 transitions. [2022-01-28 14:37:07,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 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) [2022-01-28 14:37:07,368 INFO L276 IsEmpty]: Start isEmpty. Operand 42944 states and 181219 transitions. [2022-01-28 14:37:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:37:07,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:07,452 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:07,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:07,667 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,SelfDestructingSolverStorable48 [2022-01-28 14:37:07,668 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:37:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:07,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1456536937, now seen corresponding path program 19 times [2022-01-28 14:37:07,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:07,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983777960] [2022-01-28 14:37:07,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:07,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:07,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:07,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983777960] [2022-01-28 14:37:07,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983777960] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:07,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649397471] [2022-01-28 14:37:07,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:37:07,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:07,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:07,713 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) [2022-01-28 14:37:07,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-28 14:37:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:07,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-28 14:37:07,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:07,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:07,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:37:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:37:07,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649397471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:07,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:07,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-01-28 14:37:07,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59966178] [2022-01-28 14:37:07,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:07,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 14:37:07,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:07,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 14:37:07,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:37:07,979 INFO L87 Difference]: Start difference. First operand 42944 states and 181219 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 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) [2022-01-28 14:37:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:08,883 INFO L93 Difference]: Finished difference Result 70324 states and 288660 transitions. [2022-01-28 14:37:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 14:37:08,884 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 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) Word has length 30 [2022-01-28 14:37:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:09,158 INFO L225 Difference]: With dead ends: 70324 [2022-01-28 14:37:09,158 INFO L226 Difference]: Without dead ends: 65874 [2022-01-28 14:37:09,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:37:09,159 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 233 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:09,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 404 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:37:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65874 states. [2022-01-28 14:37:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65874 to 54754. [2022-01-28 14:37:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54754 states, 54753 states have (on average 4.267163443099008) internal successors, (233640), 54753 states have internal predecessors, (233640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54754 states to 54754 states and 233640 transitions. [2022-01-28 14:37:11,309 INFO L78 Accepts]: Start accepts. Automaton has 54754 states and 233640 transitions. Word has length 30 [2022-01-28 14:37:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:11,309 INFO L470 AbstractCegarLoop]: Abstraction has 54754 states and 233640 transitions. [2022-01-28 14:37:11,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 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) [2022-01-28 14:37:11,309 INFO L276 IsEmpty]: Start isEmpty. Operand 54754 states and 233640 transitions. [2022-01-28 14:37:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:37:11,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:11,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:11,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:11,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-28 14:37:11,601 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:37:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1269123960, now seen corresponding path program 20 times [2022-01-28 14:37:11,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:11,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326984056] [2022-01-28 14:37:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:11,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:11,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:11,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326984056] [2022-01-28 14:37:11,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326984056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:11,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686280768] [2022-01-28 14:37:11,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:37:11,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:11,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:11,670 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) [2022-01-28 14:37:11,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-28 14:37:11,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:37:11,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:11,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-28 14:37:11,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:11,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:12,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686280768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:12,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:12,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2022-01-28 14:37:12,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82081156] [2022-01-28 14:37:12,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:12,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 14:37:12,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 14:37:12,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:37:12,082 INFO L87 Difference]: Start difference. First operand 54754 states and 233640 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:16,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:16,473 INFO L93 Difference]: Finished difference Result 184005 states and 756361 transitions. [2022-01-28 14:37:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-28 14:37:16,474 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 14:37:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:17,922 INFO L225 Difference]: With dead ends: 184005 [2022-01-28 14:37:17,923 INFO L226 Difference]: Without dead ends: 181824 [2022-01-28 14:37:17,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1272, Invalid=5534, Unknown=0, NotChecked=0, Total=6806 [2022-01-28 14:37:17,940 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 685 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 4154 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:17,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1394 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4154 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 14:37:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181824 states. [2022-01-28 14:37:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181824 to 106610. [2022-01-28 14:37:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106610 states, 106609 states have (on average 4.35624572034256) internal successors, (464415), 106609 states have internal predecessors, (464415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106610 states to 106610 states and 464415 transitions. [2022-01-28 14:37:23,869 INFO L78 Accepts]: Start accepts. Automaton has 106610 states and 464415 transitions. Word has length 30 [2022-01-28 14:37:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:23,869 INFO L470 AbstractCegarLoop]: Abstraction has 106610 states and 464415 transitions. [2022-01-28 14:37:23,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 106610 states and 464415 transitions. [2022-01-28 14:37:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 14:37:24,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:24,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:24,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:24,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:24,256 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:37:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:24,256 INFO L85 PathProgramCache]: Analyzing trace with hash -222328670, now seen corresponding path program 21 times [2022-01-28 14:37:24,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:24,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133335394] [2022-01-28 14:37:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:24,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:24,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133335394] [2022-01-28 14:37:24,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133335394] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069942915] [2022-01-28 14:37:24,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:37:24,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:24,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:24,326 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) [2022-01-28 14:37:24,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-28 14:37:24,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:37:24,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:24,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:37:24,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:37:24,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:37:24,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069942915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:24,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:24,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-28 14:37:24,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736830399] [2022-01-28 14:37:24,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:24,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:37:24,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:24,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:37:24,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:37:24,574 INFO L87 Difference]: Start difference. First operand 106610 states and 464415 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2022-01-28 14:37:26,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:26,860 INFO L93 Difference]: Finished difference Result 150166 states and 638300 transitions. [2022-01-28 14:37:26,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:37:26,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 14:37:26,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:28,043 INFO L225 Difference]: With dead ends: 150166 [2022-01-28 14:37:28,043 INFO L226 Difference]: Without dead ends: 149066 [2022-01-28 14:37:28,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:37:28,044 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 326 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:28,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 423 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:37:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149066 states. [2022-01-28 14:37:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149066 to 48965. [2022-01-28 14:37:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48965 states, 48964 states have (on average 4.276795196470877) internal successors, (209409), 48964 states have internal predecessors, (209409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:30,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48965 states to 48965 states and 209409 transitions. [2022-01-28 14:37:30,804 INFO L78 Accepts]: Start accepts. Automaton has 48965 states and 209409 transitions. Word has length 30 [2022-01-28 14:37:30,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:30,804 INFO L470 AbstractCegarLoop]: Abstraction has 48965 states and 209409 transitions. [2022-01-28 14:37:30,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2022-01-28 14:37:30,805 INFO L276 IsEmpty]: Start isEmpty. Operand 48965 states and 209409 transitions. [2022-01-28 14:37:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:37:31,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:31,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:31,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:31,371 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,SelfDestructingSolverStorable51 [2022-01-28 14:37:31,371 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:37:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1542296040, now seen corresponding path program 22 times [2022-01-28 14:37:31,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:31,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613087417] [2022-01-28 14:37:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:31,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:31,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:31,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613087417] [2022-01-28 14:37:31,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613087417] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:31,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724137039] [2022-01-28 14:37:31,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:37:31,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:31,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:31,550 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) [2022-01-28 14:37:31,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-28 14:37:31,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:37:31,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:31,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-28 14:37:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:37:31,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:31,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:37:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:37:32,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724137039] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:32,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:32,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2022-01-28 14:37:32,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643323476] [2022-01-28 14:37:32,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:32,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:37:32,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:32,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:37:32,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:37:32,182 INFO L87 Difference]: Start difference. First operand 48965 states and 209409 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 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) [2022-01-28 14:37:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:34,257 INFO L93 Difference]: Finished difference Result 78790 states and 327366 transitions. [2022-01-28 14:37:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-28 14:37:34,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 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) Word has length 33 [2022-01-28 14:37:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:34,946 INFO L225 Difference]: With dead ends: 78790 [2022-01-28 14:37:34,946 INFO L226 Difference]: Without dead ends: 76956 [2022-01-28 14:37:34,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2022-01-28 14:37:34,946 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 558 mSDsluCounter, 1596 mSDsCounter, 0 mSdLazyCounter, 3014 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 3052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:34,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 1116 Invalid, 3052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3014 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 14:37:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76956 states. [2022-01-28 14:37:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76956 to 51758. [2022-01-28 14:37:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51758 states, 51757 states have (on average 4.271248333558746) internal successors, (221067), 51757 states have internal predecessors, (221067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51758 states to 51758 states and 221067 transitions. [2022-01-28 14:37:37,305 INFO L78 Accepts]: Start accepts. Automaton has 51758 states and 221067 transitions. Word has length 33 [2022-01-28 14:37:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:37,306 INFO L470 AbstractCegarLoop]: Abstraction has 51758 states and 221067 transitions. [2022-01-28 14:37:37,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 22 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) [2022-01-28 14:37:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 51758 states and 221067 transitions. [2022-01-28 14:37:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:37:37,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:37,412 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:37,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:37,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:37,626 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:37:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:37,626 INFO L85 PathProgramCache]: Analyzing trace with hash -626163208, now seen corresponding path program 1 times [2022-01-28 14:37:37,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:37,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289292806] [2022-01-28 14:37:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:37,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:37,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:37,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289292806] [2022-01-28 14:37:37,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289292806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:37,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384789661] [2022-01-28 14:37:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:37,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:37,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:37,710 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) [2022-01-28 14:37:37,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-28 14:37:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:37,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:37:37,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:37,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:37:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:37,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:37,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:37,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:37:37,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:37,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:37:37,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:37,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:37:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:37,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384789661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:37,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:37,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-28 14:37:37,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676834356] [2022-01-28 14:37:37,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:37,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:37:37,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:37,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:37:37,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:37:37,964 INFO L87 Difference]: Start difference. First operand 51758 states and 221067 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 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) [2022-01-28 14:37:38,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:38,884 INFO L93 Difference]: Finished difference Result 55232 states and 233469 transitions. [2022-01-28 14:37:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:37:38,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:37:38,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:39,101 INFO L225 Difference]: With dead ends: 55232 [2022-01-28 14:37:39,101 INFO L226 Difference]: Without dead ends: 55056 [2022-01-28 14:37:39,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:37:39,105 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 172 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:39,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 403 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:37:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55056 states. [2022-01-28 14:37:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55056 to 52745. [2022-01-28 14:37:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52745 states, 52744 states have (on average 4.260977551949037) internal successors, (224741), 52744 states have internal predecessors, (224741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52745 states to 52745 states and 224741 transitions. [2022-01-28 14:37:40,692 INFO L78 Accepts]: Start accepts. Automaton has 52745 states and 224741 transitions. Word has length 33 [2022-01-28 14:37:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:40,692 INFO L470 AbstractCegarLoop]: Abstraction has 52745 states and 224741 transitions. [2022-01-28 14:37:40,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 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) [2022-01-28 14:37:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 52745 states and 224741 transitions. [2022-01-28 14:37:41,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:37:41,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:41,052 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:41,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:41,267 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,SelfDestructingSolverStorable53 [2022-01-28 14:37:41,267 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:37:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2075038142, now seen corresponding path program 1 times [2022-01-28 14:37:41,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:41,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303007626] [2022-01-28 14:37:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:41,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:41,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:41,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303007626] [2022-01-28 14:37:41,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303007626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:41,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125904728] [2022-01-28 14:37:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:41,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:41,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:41,401 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) [2022-01-28 14:37:41,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-28 14:37:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:41,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:41,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:41,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:42,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:42,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:37:42,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:42,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-01-28 14:37:42,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:42,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:37:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:42,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125904728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:42,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:42,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-28 14:37:42,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302385064] [2022-01-28 14:37:42,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:42,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:37:42,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:42,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:37:42,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:37:42,370 INFO L87 Difference]: Start difference. First operand 52745 states and 224741 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:43,272 INFO L93 Difference]: Finished difference Result 55223 states and 233029 transitions. [2022-01-28 14:37:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 14:37:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:37:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:43,509 INFO L225 Difference]: With dead ends: 55223 [2022-01-28 14:37:43,509 INFO L226 Difference]: Without dead ends: 54857 [2022-01-28 14:37:43,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:37:43,510 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 190 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:43,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 483 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 665 Invalid, 0 Unknown, 234 Unchecked, 0.3s Time] [2022-01-28 14:37:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54857 states. [2022-01-28 14:37:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54857 to 53763. [2022-01-28 14:37:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53763 states, 53762 states have (on average 4.249544287786913) internal successors, (228464), 53762 states have internal predecessors, (228464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53763 states to 53763 states and 228464 transitions. [2022-01-28 14:37:45,459 INFO L78 Accepts]: Start accepts. Automaton has 53763 states and 228464 transitions. Word has length 33 [2022-01-28 14:37:45,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:45,459 INFO L470 AbstractCegarLoop]: Abstraction has 53763 states and 228464 transitions. [2022-01-28 14:37:45,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:45,460 INFO L276 IsEmpty]: Start isEmpty. Operand 53763 states and 228464 transitions. [2022-01-28 14:37:45,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:37:45,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:45,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:45,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:45,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:45,787 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:37:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1347145400, now seen corresponding path program 2 times [2022-01-28 14:37:45,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:45,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974135262] [2022-01-28 14:37:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:45,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:45,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974135262] [2022-01-28 14:37:45,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974135262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721327203] [2022-01-28 14:37:45,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:37:45,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:45,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:45,887 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) [2022-01-28 14:37:45,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-28 14:37:45,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:37:45,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:45,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:37:45,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:46,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:37:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:46,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:46,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:46,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:37:46,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:46,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:37:46,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:46,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:37:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:46,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721327203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:46,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:46,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-28 14:37:46,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126619307] [2022-01-28 14:37:46,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:46,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:37:46,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:46,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:37:46,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:37:46,206 INFO L87 Difference]: Start difference. First operand 53763 states and 228464 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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) [2022-01-28 14:37:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:47,406 INFO L93 Difference]: Finished difference Result 59813 states and 249425 transitions. [2022-01-28 14:37:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 14:37:47,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:37:47,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:47,647 INFO L225 Difference]: With dead ends: 59813 [2022-01-28 14:37:47,648 INFO L226 Difference]: Without dead ends: 59755 [2022-01-28 14:37:47,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:37:47,648 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 238 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:47,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 379 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 14:37:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59755 states. [2022-01-28 14:37:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59755 to 54052. [2022-01-28 14:37:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54052 states, 54051 states have (on average 4.245693881704316) internal successors, (229484), 54051 states have internal predecessors, (229484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54052 states to 54052 states and 229484 transitions. [2022-01-28 14:37:49,565 INFO L78 Accepts]: Start accepts. Automaton has 54052 states and 229484 transitions. Word has length 33 [2022-01-28 14:37:49,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:49,565 INFO L470 AbstractCegarLoop]: Abstraction has 54052 states and 229484 transitions. [2022-01-28 14:37:49,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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) [2022-01-28 14:37:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 54052 states and 229484 transitions. [2022-01-28 14:37:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:37:49,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:49,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:49,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:49,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:49,883 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:37:49,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:49,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1278628516, now seen corresponding path program 2 times [2022-01-28 14:37:49,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:49,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363031501] [2022-01-28 14:37:49,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:49,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:50,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:50,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363031501] [2022-01-28 14:37:50,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363031501] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:50,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297975159] [2022-01-28 14:37:50,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:37:50,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:50,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:50,018 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) [2022-01-28 14:37:50,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-28 14:37:50,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:37:50,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:50,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:37:50,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:50,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:50,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:50,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:37:50,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:50,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-01-28 14:37:50,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:50,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:37:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:50,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297975159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:50,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:50,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-28 14:37:50,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938778545] [2022-01-28 14:37:50,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:50,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:37:50,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:37:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:37:50,730 INFO L87 Difference]: Start difference. First operand 54052 states and 229484 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:51,796 INFO L93 Difference]: Finished difference Result 55894 states and 235531 transitions. [2022-01-28 14:37:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:37:51,796 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:37:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:37:52,024 INFO L225 Difference]: With dead ends: 55894 [2022-01-28 14:37:52,024 INFO L226 Difference]: Without dead ends: 54769 [2022-01-28 14:37:52,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:37:52,024 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 204 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:37:52,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 497 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 938 Invalid, 0 Unknown, 697 Unchecked, 0.3s Time] [2022-01-28 14:37:52,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54769 states. [2022-01-28 14:37:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54769 to 53224. [2022-01-28 14:37:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53224 states, 53223 states have (on average 4.254457659282641) internal successors, (226435), 53223 states have internal predecessors, (226435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53224 states to 53224 states and 226435 transitions. [2022-01-28 14:37:53,980 INFO L78 Accepts]: Start accepts. Automaton has 53224 states and 226435 transitions. Word has length 33 [2022-01-28 14:37:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:37:53,981 INFO L470 AbstractCegarLoop]: Abstraction has 53224 states and 226435 transitions. [2022-01-28 14:37:53,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:53,981 INFO L276 IsEmpty]: Start isEmpty. Operand 53224 states and 226435 transitions. [2022-01-28 14:37:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:37:54,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:37:54,098 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:37:54,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-28 14:37:54,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-28 14:37:54,301 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:37:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:37:54,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1253608886, now seen corresponding path program 3 times [2022-01-28 14:37:54,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:37:54,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755429520] [2022-01-28 14:37:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:37:54,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:37:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:37:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:54,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:37:54,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755429520] [2022-01-28 14:37:54,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755429520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:37:54,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093139889] [2022-01-28 14:37:54,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:37:54,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:37:54,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:37:54,429 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) [2022-01-28 14:37:54,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-28 14:37:54,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:37:54,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:37:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-28 14:37:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:37:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:54,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:37:54,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:54,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:37:55,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:55,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 64 [2022-01-28 14:37:55,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:37:55,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2022-01-28 14:37:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:37:56,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093139889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:37:56,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:37:56,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2022-01-28 14:37:56,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579317192] [2022-01-28 14:37:56,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:37:56,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 14:37:56,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:37:56,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 14:37:56,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:37:56,189 INFO L87 Difference]: Start difference. First operand 53224 states and 226435 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:37:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:37:59,782 INFO L93 Difference]: Finished difference Result 58827 states and 243926 transitions. [2022-01-28 14:37:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-28 14:37:59,782 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:37:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:00,038 INFO L225 Difference]: With dead ends: 58827 [2022-01-28 14:38:00,038 INFO L226 Difference]: Without dead ends: 57760 [2022-01-28 14:38:00,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1051, Invalid=5429, Unknown=0, NotChecked=0, Total=6480 [2022-01-28 14:38:00,047 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1069 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 3162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 724 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:00,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 769 Invalid, 3162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2353 Invalid, 0 Unknown, 724 Unchecked, 1.1s Time] [2022-01-28 14:38:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57760 states. [2022-01-28 14:38:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57760 to 53698. [2022-01-28 14:38:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53698 states, 53697 states have (on average 4.24898970147308) internal successors, (228158), 53697 states have internal predecessors, (228158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53698 states to 53698 states and 228158 transitions. [2022-01-28 14:38:01,901 INFO L78 Accepts]: Start accepts. Automaton has 53698 states and 228158 transitions. Word has length 33 [2022-01-28 14:38:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:01,901 INFO L470 AbstractCegarLoop]: Abstraction has 53698 states and 228158 transitions. [2022-01-28 14:38:01,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 53698 states and 228158 transitions. [2022-01-28 14:38:02,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:38:02,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:02,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:02,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:02,231 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,SelfDestructingSolverStorable57 [2022-01-28 14:38:02,231 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:38:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:02,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1730307346, now seen corresponding path program 4 times [2022-01-28 14:38:02,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:02,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228519090] [2022-01-28 14:38:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:02,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:02,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:02,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228519090] [2022-01-28 14:38:02,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228519090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:02,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922913454] [2022-01-28 14:38:02,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:38:02,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:02,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:02,366 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) [2022-01-28 14:38:02,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-28 14:38:02,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:38:02,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:02,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:38:02,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:02,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:03,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:38:03,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:38:03,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:38:03,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-01-28 14:38:03,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:38:03,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:38:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:03,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922913454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:03,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:03,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-28 14:38:03,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117753256] [2022-01-28 14:38:03,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:03,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:38:03,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:03,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:38:03,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:38:03,277 INFO L87 Difference]: Start difference. First operand 53698 states and 228158 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:04,900 INFO L93 Difference]: Finished difference Result 55027 states and 232304 transitions. [2022-01-28 14:38:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 14:38:04,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:38:04,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:05,108 INFO L225 Difference]: With dead ends: 55027 [2022-01-28 14:38:05,108 INFO L226 Difference]: Without dead ends: 54287 [2022-01-28 14:38:05,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 14:38:05,109 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 406 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:05,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 547 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1944 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:38:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54287 states. [2022-01-28 14:38:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54287 to 53507. [2022-01-28 14:38:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53507 states, 53506 states have (on average 4.2483459798901055) internal successors, (227312), 53506 states have internal predecessors, (227312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53507 states to 53507 states and 227312 transitions. [2022-01-28 14:38:06,722 INFO L78 Accepts]: Start accepts. Automaton has 53507 states and 227312 transitions. Word has length 33 [2022-01-28 14:38:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:06,722 INFO L470 AbstractCegarLoop]: Abstraction has 53507 states and 227312 transitions. [2022-01-28 14:38:06,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 53507 states and 227312 transitions. [2022-01-28 14:38:07,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:38:07,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:07,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:07,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:07,327 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,SelfDestructingSolverStorable58 [2022-01-28 14:38:07,328 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:38:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:07,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1561544546, now seen corresponding path program 23 times [2022-01-28 14:38:07,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:07,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377579084] [2022-01-28 14:38:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:07,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:38:07,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:07,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377579084] [2022-01-28 14:38:07,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377579084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:07,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199100146] [2022-01-28 14:38:07,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:38:07,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:07,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:07,439 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) [2022-01-28 14:38:07,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-28 14:38:07,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:38:07,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:38:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:07,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:07,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:38:07,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2022-01-28 14:38:07,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-01-28 14:38:07,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-01-28 14:38:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:38:08,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199100146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:08,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:08,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2022-01-28 14:38:08,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243653997] [2022-01-28 14:38:08,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:08,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:38:08,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:38:08,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:38:08,169 INFO L87 Difference]: Start difference. First operand 53507 states and 227312 transitions. Second operand has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:34,962 INFO L93 Difference]: Finished difference Result 266315 states and 998702 transitions. [2022-01-28 14:38:34,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 472 states. [2022-01-28 14:38:34,962 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:38:34,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:36,228 INFO L225 Difference]: With dead ends: 266315 [2022-01-28 14:38:36,228 INFO L226 Difference]: Without dead ends: 241588 [2022-01-28 14:38:36,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 480 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100407 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=30504, Invalid=201338, Unknown=0, NotChecked=0, Total=231842 [2022-01-28 14:38:36,237 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 3000 mSDsluCounter, 10592 mSDsCounter, 0 mSdLazyCounter, 19215 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3000 SdHoareTripleChecker+Valid, 7149 SdHoareTripleChecker+Invalid, 19841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 19215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:36,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3000 Valid, 7149 Invalid, 19841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [626 Valid, 19215 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-28 14:38:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241588 states. [2022-01-28 14:38:43,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241588 to 105151. [2022-01-28 14:38:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105151 states, 105150 states have (on average 4.288882548739895) internal successors, (450976), 105150 states have internal predecessors, (450976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105151 states to 105151 states and 450976 transitions. [2022-01-28 14:38:44,792 INFO L78 Accepts]: Start accepts. Automaton has 105151 states and 450976 transitions. Word has length 33 [2022-01-28 14:38:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:44,792 INFO L470 AbstractCegarLoop]: Abstraction has 105151 states and 450976 transitions. [2022-01-28 14:38:44,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.032258064516129) internal successors, (94), 30 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:44,792 INFO L276 IsEmpty]: Start isEmpty. Operand 105151 states and 450976 transitions. [2022-01-28 14:38:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:38:45,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:45,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:45,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:45,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-28 14:38:45,648 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:38:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash -428595174, now seen corresponding path program 24 times [2022-01-28 14:38:45,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:45,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711108054] [2022-01-28 14:38:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:45,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:38:45,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:45,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711108054] [2022-01-28 14:38:45,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711108054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:45,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840277371] [2022-01-28 14:38:45,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:38:45,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:45,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:45,792 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) [2022-01-28 14:38:45,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-28 14:38:45,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:38:45,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:38:45,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:38:45,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:38:46,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:46,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:38:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:38:46,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840277371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:46,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:46,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-01-28 14:38:46,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474118854] [2022-01-28 14:38:46,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:46,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:38:46,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:46,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:38:46,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:38:46,284 INFO L87 Difference]: Start difference. First operand 105151 states and 450976 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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) [2022-01-28 14:38:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:48,551 INFO L93 Difference]: Finished difference Result 157171 states and 663249 transitions. [2022-01-28 14:38:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:38:48,551 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:38:48,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:49,362 INFO L225 Difference]: With dead ends: 157171 [2022-01-28 14:38:49,362 INFO L226 Difference]: Without dead ends: 153426 [2022-01-28 14:38:49,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:38:49,363 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 619 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:49,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 536 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:38:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153426 states. [2022-01-28 14:38:53,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153426 to 111142. [2022-01-28 14:38:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111142 states, 111141 states have (on average 4.314627365238751) internal successors, (479532), 111141 states have internal predecessors, (479532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:38:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111142 states to 111142 states and 479532 transitions. [2022-01-28 14:38:54,933 INFO L78 Accepts]: Start accepts. Automaton has 111142 states and 479532 transitions. Word has length 33 [2022-01-28 14:38:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:38:54,933 INFO L470 AbstractCegarLoop]: Abstraction has 111142 states and 479532 transitions. [2022-01-28 14:38:54,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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) [2022-01-28 14:38:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 111142 states and 479532 transitions. [2022-01-28 14:38:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:38:55,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:38:55,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:38:55,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-28 14:38:55,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:55,391 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:38:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:38:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash -43941796, now seen corresponding path program 25 times [2022-01-28 14:38:55,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:38:55,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137458603] [2022-01-28 14:38:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:38:55,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:38:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:38:55,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:38:55,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137458603] [2022-01-28 14:38:55,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137458603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:38:55,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26279098] [2022-01-28 14:38:55,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:38:55,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:38:55,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:38:55,483 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) [2022-01-28 14:38:55,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-28 14:38:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:38:55,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-28 14:38:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:38:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:38:55,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:38:55,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-01-28 14:38:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-28 14:38:55,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26279098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:38:55,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:38:55,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-28 14:38:55,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192790575] [2022-01-28 14:38:55,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:38:55,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:38:55,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:38:55,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:38:55,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:38:55,928 INFO L87 Difference]: Start difference. First operand 111142 states and 479532 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 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) [2022-01-28 14:38:57,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:38:57,982 INFO L93 Difference]: Finished difference Result 157883 states and 663723 transitions. [2022-01-28 14:38:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:38:57,983 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:38:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:38:59,113 INFO L225 Difference]: With dead ends: 157883 [2022-01-28 14:38:59,114 INFO L226 Difference]: Without dead ends: 155564 [2022-01-28 14:38:59,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:38:59,114 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 567 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:38:59,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 657 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:38:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155564 states. [2022-01-28 14:39:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155564 to 103407. [2022-01-28 14:39:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103407 states, 103406 states have (on average 4.300127652167186) internal successors, (444659), 103406 states have internal predecessors, (444659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103407 states to 103407 states and 444659 transitions. [2022-01-28 14:39:04,193 INFO L78 Accepts]: Start accepts. Automaton has 103407 states and 444659 transitions. Word has length 33 [2022-01-28 14:39:04,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:39:04,193 INFO L470 AbstractCegarLoop]: Abstraction has 103407 states and 444659 transitions. [2022-01-28 14:39:04,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 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) [2022-01-28 14:39:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 103407 states and 444659 transitions. [2022-01-28 14:39:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:39:04,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:39:04,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:39:04,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-28 14:39:04,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:04,623 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:39:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:39:04,624 INFO L85 PathProgramCache]: Analyzing trace with hash -869198794, now seen corresponding path program 5 times [2022-01-28 14:39:04,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:39:04,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638589196] [2022-01-28 14:39:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:04,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:39:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:04,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:39:04,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638589196] [2022-01-28 14:39:04,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638589196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:39:04,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147117306] [2022-01-28 14:39:04,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:39:04,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:04,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:39:04,791 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) [2022-01-28 14:39:04,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-28 14:39:04,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:39:04,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:39:04,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:39:04,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:39:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:05,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:05,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:05,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:39:05,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:05,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-01-28 14:39:05,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:05,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:39:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:05,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147117306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:05,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:05,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-28 14:39:05,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734952626] [2022-01-28 14:39:05,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:05,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:39:05,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:05,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:39:05,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:39:05,707 INFO L87 Difference]: Start difference. First operand 103407 states and 444659 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:07,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:07,760 INFO L93 Difference]: Finished difference Result 114255 states and 481959 transitions. [2022-01-28 14:39:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-28 14:39:07,761 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:39:07,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:08,308 INFO L225 Difference]: With dead ends: 114255 [2022-01-28 14:39:08,308 INFO L226 Difference]: Without dead ends: 114045 [2022-01-28 14:39:08,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=440, Invalid=2212, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 14:39:08,309 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 525 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 2277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:08,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 643 Invalid, 2277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1064 Invalid, 0 Unknown, 1181 Unchecked, 0.5s Time] [2022-01-28 14:39:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114045 states. [2022-01-28 14:39:11,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114045 to 106378. [2022-01-28 14:39:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106378 states, 106377 states have (on average 4.289752484089606) internal successors, (456331), 106377 states have internal predecessors, (456331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:12,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106378 states to 106378 states and 456331 transitions. [2022-01-28 14:39:12,793 INFO L78 Accepts]: Start accepts. Automaton has 106378 states and 456331 transitions. Word has length 33 [2022-01-28 14:39:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:39:12,793 INFO L470 AbstractCegarLoop]: Abstraction has 106378 states and 456331 transitions. [2022-01-28 14:39:12,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:12,793 INFO L276 IsEmpty]: Start isEmpty. Operand 106378 states and 456331 transitions. [2022-01-28 14:39:13,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:39:13,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:39:13,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:39:13,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-28 14:39:13,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:13,226 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:39:13,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:39:13,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1761411824, now seen corresponding path program 6 times [2022-01-28 14:39:13,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:39:13,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637419152] [2022-01-28 14:39:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:13,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:39:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:13,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:39:13,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637419152] [2022-01-28 14:39:13,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637419152] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:39:13,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326470731] [2022-01-28 14:39:13,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:39:13,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:13,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:39:13,411 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) [2022-01-28 14:39:13,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-28 14:39:13,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:39:13,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:39:13,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:39:13,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:39:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:14,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:14,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:14,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:39:14,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:14,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-01-28 14:39:14,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:14,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:39:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:14,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326470731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:14,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:14,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-28 14:39:14,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710496152] [2022-01-28 14:39:14,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:14,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:39:14,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:14,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:39:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:39:14,445 INFO L87 Difference]: Start difference. First operand 106378 states and 456331 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:17,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:17,369 INFO L93 Difference]: Finished difference Result 126893 states and 533544 transitions. [2022-01-28 14:39:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-28 14:39:17,370 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:39:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:18,046 INFO L225 Difference]: With dead ends: 126893 [2022-01-28 14:39:18,046 INFO L226 Difference]: Without dead ends: 125651 [2022-01-28 14:39:18,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=629, Invalid=3661, Unknown=0, NotChecked=0, Total=4290 [2022-01-28 14:39:18,047 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 456 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 559 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:18,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 692 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1234 Invalid, 0 Unknown, 559 Unchecked, 0.5s Time] [2022-01-28 14:39:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125651 states. [2022-01-28 14:39:21,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125651 to 107742. [2022-01-28 14:39:21,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107742 states, 107741 states have (on average 4.284246479984407) internal successors, (461589), 107741 states have internal predecessors, (461589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107742 states to 107742 states and 461589 transitions. [2022-01-28 14:39:22,827 INFO L78 Accepts]: Start accepts. Automaton has 107742 states and 461589 transitions. Word has length 33 [2022-01-28 14:39:22,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:39:22,827 INFO L470 AbstractCegarLoop]: Abstraction has 107742 states and 461589 transitions. [2022-01-28 14:39:22,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:22,827 INFO L276 IsEmpty]: Start isEmpty. Operand 107742 states and 461589 transitions. [2022-01-28 14:39:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:39:23,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:39:23,208 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:39:23,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-28 14:39:23,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:23,425 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:39:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:39:23,426 INFO L85 PathProgramCache]: Analyzing trace with hash -549662216, now seen corresponding path program 2 times [2022-01-28 14:39:23,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:39:23,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211370530] [2022-01-28 14:39:23,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:23,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:39:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:23,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:39:23,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211370530] [2022-01-28 14:39:23,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211370530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:39:23,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314675264] [2022-01-28 14:39:23,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:39:23,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:23,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:39:23,601 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) [2022-01-28 14:39:23,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:39:23,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:39:23,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-28 14:39:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:39:23,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:39:23,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:39:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:23,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:23,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:23,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-28 14:39:23,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:23,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:39:23,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:23,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:39:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:24,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314675264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:24,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:24,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-28 14:39:24,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901289638] [2022-01-28 14:39:24,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:24,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:39:24,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:39:24,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:39:24,042 INFO L87 Difference]: Start difference. First operand 107742 states and 461589 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 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) [2022-01-28 14:39:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:25,504 INFO L93 Difference]: Finished difference Result 111901 states and 474842 transitions. [2022-01-28 14:39:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:39:25,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 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) Word has length 33 [2022-01-28 14:39:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:26,381 INFO L225 Difference]: With dead ends: 111901 [2022-01-28 14:39:26,381 INFO L226 Difference]: Without dead ends: 111901 [2022-01-28 14:39:26,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-01-28 14:39:26,382 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 238 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:26,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 317 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:39:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111901 states. [2022-01-28 14:39:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111901 to 107804. [2022-01-28 14:39:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107804 states, 107803 states have (on average 4.283730508427409) internal successors, (461799), 107803 states have internal predecessors, (461799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107804 states to 107804 states and 461799 transitions. [2022-01-28 14:39:30,603 INFO L78 Accepts]: Start accepts. Automaton has 107804 states and 461799 transitions. Word has length 33 [2022-01-28 14:39:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:39:30,603 INFO L470 AbstractCegarLoop]: Abstraction has 107804 states and 461799 transitions. [2022-01-28 14:39:30,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 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) [2022-01-28 14:39:30,603 INFO L276 IsEmpty]: Start isEmpty. Operand 107804 states and 461799 transitions. [2022-01-28 14:39:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:39:30,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:39:30,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:39:30,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-28 14:39:31,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:31,039 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:39:31,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:39:31,039 INFO L85 PathProgramCache]: Analyzing trace with hash 366470616, now seen corresponding path program 1 times [2022-01-28 14:39:31,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:39:31,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96107652] [2022-01-28 14:39:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:31,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:39:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:31,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:39:31,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96107652] [2022-01-28 14:39:31,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96107652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:39:31,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497449061] [2022-01-28 14:39:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:31,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:31,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:39:31,208 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) [2022-01-28 14:39:31,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-28 14:39:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:31,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:39:31,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:39:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:31,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:32,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:32,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:39:32,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:32,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:39:32,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:32,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:39:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:32,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497449061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:32,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:32,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-28 14:39:32,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632700744] [2022-01-28 14:39:32,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:32,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:39:32,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:32,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:39:32,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:39:32,326 INFO L87 Difference]: Start difference. First operand 107804 states and 461799 transitions. Second operand has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:34,190 INFO L93 Difference]: Finished difference Result 113322 states and 479625 transitions. [2022-01-28 14:39:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 14:39:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:39:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:35,072 INFO L225 Difference]: With dead ends: 113322 [2022-01-28 14:39:35,073 INFO L226 Difference]: Without dead ends: 111885 [2022-01-28 14:39:35,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:39:35,073 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 376 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:35,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 920 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2002 Invalid, 0 Unknown, 397 Unchecked, 0.7s Time] [2022-01-28 14:39:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111885 states. [2022-01-28 14:39:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111885 to 108370. [2022-01-28 14:39:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108370 states, 108369 states have (on average 4.279895542083068) internal successors, (463808), 108369 states have internal predecessors, (463808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108370 states to 108370 states and 463808 transitions. [2022-01-28 14:39:39,412 INFO L78 Accepts]: Start accepts. Automaton has 108370 states and 463808 transitions. Word has length 33 [2022-01-28 14:39:39,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:39:39,412 INFO L470 AbstractCegarLoop]: Abstraction has 108370 states and 463808 transitions. [2022-01-28 14:39:39,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:39,412 INFO L276 IsEmpty]: Start isEmpty. Operand 108370 states and 463808 transitions. [2022-01-28 14:39:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:39:39,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:39:39,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:39:39,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-28 14:39:39,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-28 14:39:39,850 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:39:39,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:39:39,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2105226590, now seen corresponding path program 3 times [2022-01-28 14:39:39,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:39:39,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800313805] [2022-01-28 14:39:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:39,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:39:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:40,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:39:40,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800313805] [2022-01-28 14:39:40,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800313805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:39:40,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152390292] [2022-01-28 14:39:40,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:39:40,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:40,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:39:40,504 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) [2022-01-28 14:39:40,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-28 14:39:40,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:39:40,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:39:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:39:40,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:39:40,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:39:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:40,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:41,166 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 14:39:41,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 62 [2022-01-28 14:39:41,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:41,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 45 [2022-01-28 14:39:41,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:39:41,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:41,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 45 [2022-01-28 14:39:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:42,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152390292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:42,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:42,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2022-01-28 14:39:42,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050429559] [2022-01-28 14:39:42,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:42,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:39:42,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:42,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:39:42,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:39:42,328 INFO L87 Difference]: Start difference. First operand 108370 states and 463808 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:47,948 INFO L93 Difference]: Finished difference Result 132295 states and 547373 transitions. [2022-01-28 14:39:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-28 14:39:47,948 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:39:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:48,627 INFO L225 Difference]: With dead ends: 132295 [2022-01-28 14:39:48,628 INFO L226 Difference]: Without dead ends: 132063 [2022-01-28 14:39:48,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2912 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1302, Invalid=8400, Unknown=0, NotChecked=0, Total=9702 [2022-01-28 14:39:48,628 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 820 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 3293 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 4053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 671 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:48,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 1458 Invalid, 4053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3293 Invalid, 0 Unknown, 671 Unchecked, 1.2s Time] [2022-01-28 14:39:49,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132063 states. [2022-01-28 14:39:52,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132063 to 109527. [2022-01-28 14:39:52,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109527 states, 109526 states have (on average 4.270958493873601) internal successors, (467781), 109526 states have internal predecessors, (467781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109527 states to 109527 states and 467781 transitions. [2022-01-28 14:39:53,348 INFO L78 Accepts]: Start accepts. Automaton has 109527 states and 467781 transitions. Word has length 33 [2022-01-28 14:39:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:39:53,348 INFO L470 AbstractCegarLoop]: Abstraction has 109527 states and 467781 transitions. [2022-01-28 14:39:53,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 109527 states and 467781 transitions. [2022-01-28 14:39:53,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:39:53,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:39:53,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:39:53,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-28 14:39:53,782 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,SelfDestructingSolverStorable66 [2022-01-28 14:39:53,783 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:39:53,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:39:53,783 INFO L85 PathProgramCache]: Analyzing trace with hash 440573310, now seen corresponding path program 1 times [2022-01-28 14:39:53,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:39:53,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979149390] [2022-01-28 14:39:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:53,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:39:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:54,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:39:54,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979149390] [2022-01-28 14:39:54,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979149390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:39:54,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383661920] [2022-01-28 14:39:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:39:54,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:39:54,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:39:54,068 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) [2022-01-28 14:39:54,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-28 14:39:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:39:54,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:39:54,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:39:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:54,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:39:55,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:55,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:39:55,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:55,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:39:55,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:39:55,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:39:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:39:55,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383661920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:39:55,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:39:55,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-28 14:39:55,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264735726] [2022-01-28 14:39:55,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:39:55,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:39:55,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:39:55,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:39:55,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:39:55,318 INFO L87 Difference]: Start difference. First operand 109527 states and 467781 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:39:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:39:57,864 INFO L93 Difference]: Finished difference Result 132109 states and 549570 transitions. [2022-01-28 14:39:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-28 14:39:57,864 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:39:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:39:58,564 INFO L225 Difference]: With dead ends: 132109 [2022-01-28 14:39:58,564 INFO L226 Difference]: Without dead ends: 130716 [2022-01-28 14:39:58,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=339, Invalid=2111, Unknown=0, NotChecked=0, Total=2450 [2022-01-28 14:39:58,565 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 494 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:39:58,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 844 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 14:39:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130716 states. [2022-01-28 14:40:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130716 to 110131. [2022-01-28 14:40:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110131 states, 110130 states have (on average 4.267202397166985) internal successors, (469947), 110130 states have internal predecessors, (469947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110131 states to 110131 states and 469947 transitions. [2022-01-28 14:40:03,412 INFO L78 Accepts]: Start accepts. Automaton has 110131 states and 469947 transitions. Word has length 33 [2022-01-28 14:40:03,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:03,412 INFO L470 AbstractCegarLoop]: Abstraction has 110131 states and 469947 transitions. [2022-01-28 14:40:03,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 110131 states and 469947 transitions. [2022-01-28 14:40:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:40:03,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:03,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:03,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-28 14:40:03,846 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,SelfDestructingSolverStorable67 [2022-01-28 14:40:03,846 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:40:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:03,847 INFO L85 PathProgramCache]: Analyzing trace with hash 48779896, now seen corresponding path program 4 times [2022-01-28 14:40:03,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:03,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398638749] [2022-01-28 14:40:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:03,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:03,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:03,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398638749] [2022-01-28 14:40:03,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398638749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:03,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347841677] [2022-01-28 14:40:03,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:40:03,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:04,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:04,000 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) [2022-01-28 14:40:04,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-28 14:40:04,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:40:04,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:40:04,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:40:04,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:04,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:40:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:04,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:04,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:04,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-28 14:40:04,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:04,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:40:04,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:04,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:40:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:04,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347841677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:04,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:04,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-28 14:40:04,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270787504] [2022-01-28 14:40:04,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:04,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:40:04,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:04,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:40:04,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:40:04,697 INFO L87 Difference]: Start difference. First operand 110131 states and 469947 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:40:06,412 INFO L93 Difference]: Finished difference Result 113781 states and 481636 transitions. [2022-01-28 14:40:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:40:06,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:40:06,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:40:07,267 INFO L225 Difference]: With dead ends: 113781 [2022-01-28 14:40:07,267 INFO L226 Difference]: Without dead ends: 113781 [2022-01-28 14:40:07,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:40:07,283 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 166 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:40:07,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 332 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:40:07,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113781 states. [2022-01-28 14:40:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113781 to 110137. [2022-01-28 14:40:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110137 states, 110136 states have (on average 4.267169681121523) internal successors, (469969), 110136 states have internal predecessors, (469969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110137 states to 110137 states and 469969 transitions. [2022-01-28 14:40:12,150 INFO L78 Accepts]: Start accepts. Automaton has 110137 states and 469969 transitions. Word has length 33 [2022-01-28 14:40:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:12,150 INFO L470 AbstractCegarLoop]: Abstraction has 110137 states and 469969 transitions. [2022-01-28 14:40:12,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 110137 states and 469969 transitions. [2022-01-28 14:40:12,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:40:12,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:12,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:12,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-28 14:40:12,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:12,615 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:40:12,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:12,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1955188072, now seen corresponding path program 2 times [2022-01-28 14:40:12,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:12,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620658703] [2022-01-28 14:40:12,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:12,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:12,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:12,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620658703] [2022-01-28 14:40:12,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620658703] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:12,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211714932] [2022-01-28 14:40:12,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:40:12,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:12,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:12,780 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) [2022-01-28 14:40:12,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-28 14:40:12,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:40:12,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:40:12,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:40:12,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:13,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:13,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:13,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-01-28 14:40:13,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:13,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:40:13,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:13,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:40:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:13,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211714932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:13,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:13,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-28 14:40:13,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743511511] [2022-01-28 14:40:13,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:13,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:40:13,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:13,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:40:13,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:40:13,655 INFO L87 Difference]: Start difference. First operand 110137 states and 469969 transitions. Second operand has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:40:17,651 INFO L93 Difference]: Finished difference Result 132978 states and 554601 transitions. [2022-01-28 14:40:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-28 14:40:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:40:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:40:18,318 INFO L225 Difference]: With dead ends: 132978 [2022-01-28 14:40:18,318 INFO L226 Difference]: Without dead ends: 131855 [2022-01-28 14:40:18,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=652, Invalid=4178, Unknown=0, NotChecked=0, Total=4830 [2022-01-28 14:40:18,318 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 397 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 3532 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 4125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:40:18,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 1244 Invalid, 4125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3532 Invalid, 0 Unknown, 565 Unchecked, 1.4s Time] [2022-01-28 14:40:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131855 states. [2022-01-28 14:40:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131855 to 110356. [2022-01-28 14:40:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110356 states, 110355 states have (on average 4.266594173349644) internal successors, (470840), 110355 states have internal predecessors, (470840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110356 states to 110356 states and 470840 transitions. [2022-01-28 14:40:23,213 INFO L78 Accepts]: Start accepts. Automaton has 110356 states and 470840 transitions. Word has length 33 [2022-01-28 14:40:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:23,213 INFO L470 AbstractCegarLoop]: Abstraction has 110356 states and 470840 transitions. [2022-01-28 14:40:23,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.9565217391304346) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 110356 states and 470840 transitions. [2022-01-28 14:40:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:40:23,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:23,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:23,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-28 14:40:23,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-28 14:40:23,646 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:40:23,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash -661508158, now seen corresponding path program 2 times [2022-01-28 14:40:23,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:23,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401721550] [2022-01-28 14:40:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:23,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:23,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:23,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401721550] [2022-01-28 14:40:23,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401721550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:23,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73181823] [2022-01-28 14:40:23,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:40:23,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:23,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:23,932 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) [2022-01-28 14:40:23,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-28 14:40:23,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:40:23,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:40:23,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:40:23,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:24,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:24,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:24,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:40:25,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:25,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:40:25,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:25,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:40:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:25,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73181823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:25,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:25,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-28 14:40:25,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717503525] [2022-01-28 14:40:25,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:25,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:40:25,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:25,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:40:25,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:40:25,110 INFO L87 Difference]: Start difference. First operand 110356 states and 470840 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:40:27,428 INFO L93 Difference]: Finished difference Result 116410 states and 489911 transitions. [2022-01-28 14:40:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 14:40:27,435 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:40:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:40:28,040 INFO L225 Difference]: With dead ends: 116410 [2022-01-28 14:40:28,040 INFO L226 Difference]: Without dead ends: 114671 [2022-01-28 14:40:28,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:40:28,041 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 436 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:40:28,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 779 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 14:40:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114671 states. [2022-01-28 14:40:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114671 to 110387. [2022-01-28 14:40:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110387 states, 110386 states have (on average 4.265024550214701) internal successors, (470799), 110386 states have internal predecessors, (470799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110387 states to 110387 states and 470799 transitions. [2022-01-28 14:40:32,329 INFO L78 Accepts]: Start accepts. Automaton has 110387 states and 470799 transitions. Word has length 33 [2022-01-28 14:40:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:32,329 INFO L470 AbstractCegarLoop]: Abstraction has 110387 states and 470799 transitions. [2022-01-28 14:40:32,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 110387 states and 470799 transitions. [2022-01-28 14:40:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:40:32,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:32,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:32,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-28 14:40:33,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:33,104 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:40:33,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:33,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1091300046, now seen corresponding path program 5 times [2022-01-28 14:40:33,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:33,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128901996] [2022-01-28 14:40:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:33,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:33,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:33,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128901996] [2022-01-28 14:40:33,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128901996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:33,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501512885] [2022-01-28 14:40:33,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:40:33,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:33,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:33,230 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) [2022-01-28 14:40:33,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-28 14:40:33,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:40:33,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:40:33,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:40:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:33,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:40:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:33,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:33,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:33,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-28 14:40:33,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:33,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:40:33,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:33,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:40:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:33,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501512885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:33,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:33,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-28 14:40:33,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730203091] [2022-01-28 14:40:33,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:33,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:40:33,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:33,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:40:33,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:40:33,594 INFO L87 Difference]: Start difference. First operand 110387 states and 470799 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 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) [2022-01-28 14:40:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:40:34,981 INFO L93 Difference]: Finished difference Result 113193 states and 479370 transitions. [2022-01-28 14:40:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:40:34,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:40:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:40:35,827 INFO L225 Difference]: With dead ends: 113193 [2022-01-28 14:40:35,827 INFO L226 Difference]: Without dead ends: 113193 [2022-01-28 14:40:35,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:40:35,828 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 161 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 14:40:35,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 329 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 14:40:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113193 states. [2022-01-28 14:40:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113193 to 110477. [2022-01-28 14:40:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110477 states, 110476 states have (on average 4.2644194214127955) internal successors, (471116), 110476 states have internal predecessors, (471116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:40,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110477 states to 110477 states and 471116 transitions. [2022-01-28 14:40:40,187 INFO L78 Accepts]: Start accepts. Automaton has 110477 states and 471116 transitions. Word has length 33 [2022-01-28 14:40:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:40,187 INFO L470 AbstractCegarLoop]: Abstraction has 110477 states and 471116 transitions. [2022-01-28 14:40:40,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 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) [2022-01-28 14:40:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 110477 states and 471116 transitions. [2022-01-28 14:40:40,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:40:40,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:40,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:40,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-28 14:40:40,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:40,987 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:40:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash -573353234, now seen corresponding path program 3 times [2022-01-28 14:40:40,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:40,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886785253] [2022-01-28 14:40:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:40,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:41,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:41,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886785253] [2022-01-28 14:40:41,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886785253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:41,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616881529] [2022-01-28 14:40:41,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:40:41,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:41,232 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) [2022-01-28 14:40:41,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-28 14:40:41,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:40:41,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:40:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 14:40:41,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:41,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:42,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:42,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-28 14:40:42,266 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-28 14:40:42,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 50 [2022-01-28 14:40:42,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:40:42,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:42,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 46 [2022-01-28 14:40:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:42,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616881529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:42,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:42,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2022-01-28 14:40:42,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108832714] [2022-01-28 14:40:42,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:42,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 14:40:42,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 14:40:42,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:40:42,348 INFO L87 Difference]: Start difference. First operand 110477 states and 471116 transitions. Second operand has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:40:47,912 INFO L93 Difference]: Finished difference Result 157435 states and 644616 transitions. [2022-01-28 14:40:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-28 14:40:47,913 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:40:47,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:40:49,288 INFO L225 Difference]: With dead ends: 157435 [2022-01-28 14:40:49,288 INFO L226 Difference]: Without dead ends: 155527 [2022-01-28 14:40:49,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3778 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1538, Invalid=9382, Unknown=0, NotChecked=0, Total=10920 [2022-01-28 14:40:49,289 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1072 mSDsluCounter, 1652 mSDsCounter, 0 mSdLazyCounter, 3800 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 3909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:40:49,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 1261 Invalid, 3909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3800 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 14:40:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155527 states. [2022-01-28 14:40:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155527 to 111735. [2022-01-28 14:40:53,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111735 states, 111734 states have (on average 4.258641058227576) internal successors, (475835), 111734 states have internal predecessors, (475835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111735 states to 111735 states and 475835 transitions. [2022-01-28 14:40:54,918 INFO L78 Accepts]: Start accepts. Automaton has 111735 states and 475835 transitions. Word has length 33 [2022-01-28 14:40:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:40:54,918 INFO L470 AbstractCegarLoop]: Abstraction has 111735 states and 475835 transitions. [2022-01-28 14:40:54,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.129032258064516) internal successors, (97), 30 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 111735 states and 475835 transitions. [2022-01-28 14:40:55,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:40:55,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:40:55,150 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:40:55,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-28 14:40:55,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:55,361 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:40:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:40:55,361 INFO L85 PathProgramCache]: Analyzing trace with hash 926979758, now seen corresponding path program 3 times [2022-01-28 14:40:55,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:40:55,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122179727] [2022-01-28 14:40:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:40:55,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:40:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:40:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:55,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:40:55,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122179727] [2022-01-28 14:40:55,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122179727] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:40:55,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786545460] [2022-01-28 14:40:55,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:40:55,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:40:55,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:40:55,531 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) [2022-01-28 14:40:55,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-28 14:40:55,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:40:55,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:40:55,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-28 14:40:55,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:40:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:55,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:40:56,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:56,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:40:56,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:56,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:40:56,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:40:56,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:40:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:40:56,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786545460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:40:56,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:40:56,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-28 14:40:56,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043192143] [2022-01-28 14:40:56,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:40:56,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-28 14:40:56,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:40:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-28 14:40:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:40:56,624 INFO L87 Difference]: Start difference. First operand 111735 states and 475835 transitions. Second operand has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:40:58,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:40:58,592 INFO L93 Difference]: Finished difference Result 115031 states and 486231 transitions. [2022-01-28 14:40:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:40:58,592 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:40:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:40:59,461 INFO L225 Difference]: With dead ends: 115031 [2022-01-28 14:40:59,461 INFO L226 Difference]: Without dead ends: 114127 [2022-01-28 14:40:59,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:40:59,461 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 323 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2111 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:40:59,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 704 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2111 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-28 14:40:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114127 states. [2022-01-28 14:41:02,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114127 to 111784. [2022-01-28 14:41:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111784 states, 111783 states have (on average 4.257990928853225) internal successors, (475971), 111783 states have internal predecessors, (475971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111784 states to 111784 states and 475971 transitions. [2022-01-28 14:41:03,856 INFO L78 Accepts]: Start accepts. Automaton has 111784 states and 475971 transitions. Word has length 33 [2022-01-28 14:41:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:41:03,856 INFO L470 AbstractCegarLoop]: Abstraction has 111784 states and 475971 transitions. [2022-01-28 14:41:03,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 111784 states and 475971 transitions. [2022-01-28 14:41:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:41:04,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:41:04,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:41:04,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-28 14:41:04,303 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,SelfDestructingSolverStorable73 [2022-01-28 14:41:04,303 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:41:04,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:41:04,304 INFO L85 PathProgramCache]: Analyzing trace with hash -26068854, now seen corresponding path program 6 times [2022-01-28 14:41:04,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:41:04,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87635855] [2022-01-28 14:41:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:41:04,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:41:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:04,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:41:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87635855] [2022-01-28 14:41:04,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87635855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:41:04,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129397959] [2022-01-28 14:41:04,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:41:04,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:04,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:41:04,470 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) [2022-01-28 14:41:04,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-28 14:41:04,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:41:04,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:41:04,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:41:04,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:41:04,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:41:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:04,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:41:04,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:04,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-28 14:41:04,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:04,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:41:04,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:04,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-01-28 14:41:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:05,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129397959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:41:05,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:41:05,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-28 14:41:05,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739234089] [2022-01-28 14:41:05,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:41:05,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 14:41:05,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:41:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 14:41:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:41:05,079 INFO L87 Difference]: Start difference. First operand 111784 states and 475971 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 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) [2022-01-28 14:41:06,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:06,333 INFO L93 Difference]: Finished difference Result 114614 states and 484536 transitions. [2022-01-28 14:41:06,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:41:06,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:41:06,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:41:06,919 INFO L225 Difference]: With dead ends: 114614 [2022-01-28 14:41:06,920 INFO L226 Difference]: Without dead ends: 114614 [2022-01-28 14:41:06,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-28 14:41:06,920 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 179 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:41:06,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 322 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:41:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114614 states. [2022-01-28 14:41:10,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114614 to 111630. [2022-01-28 14:41:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111630 states, 111629 states have (on average 4.258929131318922) internal successors, (475420), 111629 states have internal predecessors, (475420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111630 states to 111630 states and 475420 transitions. [2022-01-28 14:41:11,693 INFO L78 Accepts]: Start accepts. Automaton has 111630 states and 475420 transitions. Word has length 33 [2022-01-28 14:41:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:41:11,693 INFO L470 AbstractCegarLoop]: Abstraction has 111630 states and 475420 transitions. [2022-01-28 14:41:11,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 18 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) [2022-01-28 14:41:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 111630 states and 475420 transitions. [2022-01-28 14:41:11,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:41:11,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:41:11,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:41:11,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-28 14:41:12,156 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,SelfDestructingSolverStorable74 [2022-01-28 14:41:12,157 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:41:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:41:12,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1690722134, now seen corresponding path program 4 times [2022-01-28 14:41:12,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:41:12,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839460657] [2022-01-28 14:41:12,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:41:12,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:41:12,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:12,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:41:12,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839460657] [2022-01-28 14:41:12,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839460657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:41:12,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018413286] [2022-01-28 14:41:12,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:41:12,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:12,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:41:12,402 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) [2022-01-28 14:41:12,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-28 14:41:12,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:41:12,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:41:12,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:41:12,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:41:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:13,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:41:13,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:13,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-01-28 14:41:13,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:13,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:41:13,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:13,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:41:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:13,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018413286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:41:13,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:41:13,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-28 14:41:13,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249901636] [2022-01-28 14:41:13,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:41:13,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:41:13,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:41:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:41:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:41:13,598 INFO L87 Difference]: Start difference. First operand 111630 states and 475420 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:16,460 INFO L93 Difference]: Finished difference Result 131686 states and 549004 transitions. [2022-01-28 14:41:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-28 14:41:16,461 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:41:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:41:17,229 INFO L225 Difference]: With dead ends: 131686 [2022-01-28 14:41:17,229 INFO L226 Difference]: Without dead ends: 130178 [2022-01-28 14:41:17,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=369, Invalid=2181, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 14:41:17,229 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 562 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 3224 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 3267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:41:17,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1129 Invalid, 3267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3224 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 14:41:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130178 states. [2022-01-28 14:41:21,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130178 to 111603. [2022-01-28 14:41:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111603 states, 111602 states have (on average 4.261106431784377) internal successors, (475548), 111602 states have internal predecessors, (475548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111603 states to 111603 states and 475548 transitions. [2022-01-28 14:41:22,203 INFO L78 Accepts]: Start accepts. Automaton has 111603 states and 475548 transitions. Word has length 33 [2022-01-28 14:41:22,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:41:22,203 INFO L470 AbstractCegarLoop]: Abstraction has 111603 states and 475548 transitions. [2022-01-28 14:41:22,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:22,203 INFO L276 IsEmpty]: Start isEmpty. Operand 111603 states and 475548 transitions. [2022-01-28 14:41:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:41:22,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:41:22,447 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:41:22,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-28 14:41:22,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-01-28 14:41:22,652 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:41:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:41:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1111394312, now seen corresponding path program 3 times [2022-01-28 14:41:22,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:41:22,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371661683] [2022-01-28 14:41:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:41:22,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:41:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:22,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:41:22,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371661683] [2022-01-28 14:41:22,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371661683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:41:22,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785658753] [2022-01-28 14:41:22,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:41:22,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:22,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:41:22,775 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) [2022-01-28 14:41:22,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-28 14:41:22,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:41:22,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:41:22,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:41:22,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:41:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:23,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:41:24,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:24,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 59 [2022-01-28 14:41:24,817 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 14:41:24,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 70 [2022-01-28 14:41:24,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:41:24,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:24,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 62 [2022-01-28 14:41:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:25,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785658753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:41:25,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:41:25,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 33 [2022-01-28 14:41:25,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099827442] [2022-01-28 14:41:25,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:41:25,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 14:41:25,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:41:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 14:41:25,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:41:25,040 INFO L87 Difference]: Start difference. First operand 111603 states and 475548 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:29,659 INFO L93 Difference]: Finished difference Result 124208 states and 519385 transitions. [2022-01-28 14:41:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-28 14:41:29,659 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:41:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:41:30,583 INFO L225 Difference]: With dead ends: 124208 [2022-01-28 14:41:30,583 INFO L226 Difference]: Without dead ends: 123692 [2022-01-28 14:41:30,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3473 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1040, Invalid=9880, Unknown=0, NotChecked=0, Total=10920 [2022-01-28 14:41:30,584 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 374 mSDsluCounter, 2189 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 3985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1802 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 14:41:30,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 1588 Invalid, 3985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2140 Invalid, 0 Unknown, 1802 Unchecked, 0.8s Time] [2022-01-28 14:41:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123692 states. [2022-01-28 14:41:34,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123692 to 112311. [2022-01-28 14:41:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112311 states, 112310 states have (on average 4.256878283322945) internal successors, (478090), 112310 states have internal predecessors, (478090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112311 states to 112311 states and 478090 transitions. [2022-01-28 14:41:35,017 INFO L78 Accepts]: Start accepts. Automaton has 112311 states and 478090 transitions. Word has length 33 [2022-01-28 14:41:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:41:35,017 INFO L470 AbstractCegarLoop]: Abstraction has 112311 states and 478090 transitions. [2022-01-28 14:41:35,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 112311 states and 478090 transitions. [2022-01-28 14:41:35,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:41:35,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:41:35,605 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:41:35,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-28 14:41:35,820 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,SelfDestructingSolverStorable76 [2022-01-28 14:41:35,821 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:41:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:41:35,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1040506978, now seen corresponding path program 4 times [2022-01-28 14:41:35,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:41:35,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451892688] [2022-01-28 14:41:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:41:35,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:41:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:35,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:41:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451892688] [2022-01-28 14:41:35,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451892688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:41:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222573543] [2022-01-28 14:41:35,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:41:35,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:35,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:41:35,956 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) [2022-01-28 14:41:35,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-28 14:41:35,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:41:35,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:41:35,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:41:35,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:41:36,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:41:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:36,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:41:36,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:36,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:41:36,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:36,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:41:36,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:36,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:41:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:36,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222573543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:41:36,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:41:36,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-28 14:41:36,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063295428] [2022-01-28 14:41:36,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:41:36,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:41:36,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:41:36,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:41:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:41:36,372 INFO L87 Difference]: Start difference. First operand 112311 states and 478090 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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) [2022-01-28 14:41:38,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:38,632 INFO L93 Difference]: Finished difference Result 134669 states and 554639 transitions. [2022-01-28 14:41:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-28 14:41:38,632 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:41:38,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:41:39,312 INFO L225 Difference]: With dead ends: 134669 [2022-01-28 14:41:39,313 INFO L226 Difference]: Without dead ends: 134341 [2022-01-28 14:41:39,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2022-01-28 14:41:39,313 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 468 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 2339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:41:39,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 774 Invalid, 2339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:41:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134341 states. [2022-01-28 14:41:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134341 to 114569. [2022-01-28 14:41:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114569 states, 114568 states have (on average 4.252068640458068) internal successors, (487151), 114568 states have internal predecessors, (487151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114569 states to 114569 states and 487151 transitions. [2022-01-28 14:41:44,766 INFO L78 Accepts]: Start accepts. Automaton has 114569 states and 487151 transitions. Word has length 33 [2022-01-28 14:41:44,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:41:44,767 INFO L470 AbstractCegarLoop]: Abstraction has 114569 states and 487151 transitions. [2022-01-28 14:41:44,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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) [2022-01-28 14:41:44,767 INFO L276 IsEmpty]: Start isEmpty. Operand 114569 states and 487151 transitions. [2022-01-28 14:41:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:41:45,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:41:45,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:41:45,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-28 14:41:45,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:45,229 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:41:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:41:45,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1589807038, now seen corresponding path program 7 times [2022-01-28 14:41:45,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:41:45,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919760814] [2022-01-28 14:41:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:41:45,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:41:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:45,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:41:45,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919760814] [2022-01-28 14:41:45,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919760814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:41:45,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600859069] [2022-01-28 14:41:45,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:41:45,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:45,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:41:45,398 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) [2022-01-28 14:41:45,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-28 14:41:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:45,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:41:45,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:41:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:45,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:41:46,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:46,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:41:46,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:46,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-01-28 14:41:46,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:46,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:41:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:46,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600859069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:41:46,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:41:46,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-28 14:41:46,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081856644] [2022-01-28 14:41:46,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:41:46,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:41:46,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:41:46,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:41:46,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:41:46,601 INFO L87 Difference]: Start difference. First operand 114569 states and 487151 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-28 14:41:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:48,496 INFO L93 Difference]: Finished difference Result 123905 states and 519324 transitions. [2022-01-28 14:41:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:41:48,497 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) Word has length 33 [2022-01-28 14:41:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:41:49,430 INFO L225 Difference]: With dead ends: 123905 [2022-01-28 14:41:49,430 INFO L226 Difference]: Without dead ends: 123360 [2022-01-28 14:41:49,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 14:41:49,430 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 325 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 612 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:41:49,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 832 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1103 Invalid, 0 Unknown, 612 Unchecked, 0.4s Time] [2022-01-28 14:41:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123360 states. [2022-01-28 14:41:53,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123360 to 115934. [2022-01-28 14:41:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115934 states, 115933 states have (on average 4.2480311904289545) internal successors, (492487), 115933 states have internal predecessors, (492487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:41:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115934 states to 115934 states and 492487 transitions. [2022-01-28 14:41:54,267 INFO L78 Accepts]: Start accepts. Automaton has 115934 states and 492487 transitions. Word has length 33 [2022-01-28 14:41:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:41:54,268 INFO L470 AbstractCegarLoop]: Abstraction has 115934 states and 492487 transitions. [2022-01-28 14:41:54,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-28 14:41:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 115934 states and 492487 transitions. [2022-01-28 14:41:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:41:54,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:41:54,514 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:41:54,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-28 14:41:54,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:54,730 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:41:54,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:41:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1693413474, now seen corresponding path program 5 times [2022-01-28 14:41:54,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:41:54,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251348172] [2022-01-28 14:41:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:41:54,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:41:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:41:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:54,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:41:54,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251348172] [2022-01-28 14:41:54,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251348172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:41:54,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933506097] [2022-01-28 14:41:54,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:41:54,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:41:54,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:41:54,904 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) [2022-01-28 14:41:54,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-28 14:41:54,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:41:54,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:41:54,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:41:54,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:41:55,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:41:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:55,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:41:55,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:55,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:41:55,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:55,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:41:55,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:41:55,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:41:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:41:55,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933506097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:41:55,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:41:55,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-28 14:41:55,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409887357] [2022-01-28 14:41:55,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:41:55,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:41:55,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:41:55,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:41:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:41:55,269 INFO L87 Difference]: Start difference. First operand 115934 states and 492487 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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) [2022-01-28 14:41:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:41:57,776 INFO L93 Difference]: Finished difference Result 142788 states and 586755 transitions. [2022-01-28 14:41:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-28 14:41:57,776 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:41:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:41:58,504 INFO L225 Difference]: With dead ends: 142788 [2022-01-28 14:41:58,504 INFO L226 Difference]: Without dead ends: 142109 [2022-01-28 14:41:58,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 14:41:58,505 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 496 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:41:58,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 843 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:41:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142109 states. [2022-01-28 14:42:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142109 to 118917. [2022-01-28 14:42:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118917 states, 118916 states have (on average 4.240648861381143) internal successors, (504281), 118916 states have internal predecessors, (504281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118917 states to 118917 states and 504281 transitions. [2022-01-28 14:42:04,067 INFO L78 Accepts]: Start accepts. Automaton has 118917 states and 504281 transitions. Word has length 33 [2022-01-28 14:42:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:42:04,067 INFO L470 AbstractCegarLoop]: Abstraction has 118917 states and 504281 transitions. [2022-01-28 14:42:04,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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) [2022-01-28 14:42:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 118917 states and 504281 transitions. [2022-01-28 14:42:04,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:42:04,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:42:04,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:42:04,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-28 14:42:04,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-28 14:42:04,858 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:42:04,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:42:04,859 INFO L85 PathProgramCache]: Analyzing trace with hash 768377782, now seen corresponding path program 8 times [2022-01-28 14:42:04,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:42:04,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900734546] [2022-01-28 14:42:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:42:04,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:42:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:04,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:42:04,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900734546] [2022-01-28 14:42:04,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900734546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:42:04,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111938815] [2022-01-28 14:42:04,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:42:04,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:04,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:42:04,989 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) [2022-01-28 14:42:04,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-28 14:42:05,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:42:05,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:42:05,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:42:05,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:42:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:05,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:42:05,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:42:05,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:42:05,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:42:05,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-01-28 14:42:05,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:42:05,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:42:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:05,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111938815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:42:05,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:42:05,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-28 14:42:05,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25575346] [2022-01-28 14:42:05,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:42:05,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:42:05,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:42:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:42:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:42:05,827 INFO L87 Difference]: Start difference. First operand 118917 states and 504281 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-28 14:42:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:42:08,781 INFO L93 Difference]: Finished difference Result 135337 states and 558840 transitions. [2022-01-28 14:42:08,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-28 14:42:08,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) Word has length 33 [2022-01-28 14:42:08,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:42:09,434 INFO L225 Difference]: With dead ends: 135337 [2022-01-28 14:42:09,435 INFO L226 Difference]: Without dead ends: 132328 [2022-01-28 14:42:09,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 59 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=886, Invalid=4226, Unknown=0, NotChecked=0, Total=5112 [2022-01-28 14:42:09,435 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 949 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1159 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:42:09,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [949 Valid, 963 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1465 Invalid, 0 Unknown, 1159 Unchecked, 0.5s Time] [2022-01-28 14:42:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132328 states. [2022-01-28 14:42:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132328 to 120850. [2022-01-28 14:42:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120850 states, 120849 states have (on average 4.231669273225265) internal successors, (511393), 120849 states have internal predecessors, (511393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120850 states to 120850 states and 511393 transitions. [2022-01-28 14:42:14,765 INFO L78 Accepts]: Start accepts. Automaton has 120850 states and 511393 transitions. Word has length 33 [2022-01-28 14:42:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:42:14,765 INFO L470 AbstractCegarLoop]: Abstraction has 120850 states and 511393 transitions. [2022-01-28 14:42:14,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-28 14:42:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 120850 states and 511393 transitions. [2022-01-28 14:42:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:42:15,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:42:15,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:42:15,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-28 14:42:15,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:15,227 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:42:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:42:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash 146497372, now seen corresponding path program 9 times [2022-01-28 14:42:15,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:42:15,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844982712] [2022-01-28 14:42:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:42:15,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:42:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:15,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:42:15,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844982712] [2022-01-28 14:42:15,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844982712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:42:15,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058510861] [2022-01-28 14:42:15,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:42:15,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:15,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:42:15,354 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) [2022-01-28 14:42:15,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-28 14:42:15,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:42:15,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:42:15,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:42:15,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:42:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:16,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:42:16,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:42:16,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:42:16,716 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 14:42:16,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 62 [2022-01-28 14:42:16,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:42:16,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:42:16,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 56 [2022-01-28 14:42:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:17,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058510861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:42:17,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:42:17,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2022-01-28 14:42:17,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920801784] [2022-01-28 14:42:17,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:42:17,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 14:42:17,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:42:17,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 14:42:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:42:17,054 INFO L87 Difference]: Start difference. First operand 120850 states and 511393 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:42:23,244 INFO L93 Difference]: Finished difference Result 177615 states and 731966 transitions. [2022-01-28 14:42:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-28 14:42:23,245 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:42:23,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:42:24,551 INFO L225 Difference]: With dead ends: 177615 [2022-01-28 14:42:24,551 INFO L226 Difference]: Without dead ends: 173003 [2022-01-28 14:42:24,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3751 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1386, Invalid=9744, Unknown=0, NotChecked=0, Total=11130 [2022-01-28 14:42:24,552 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 1206 mSDsluCounter, 2086 mSDsCounter, 0 mSdLazyCounter, 4130 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 1550 SdHoareTripleChecker+Invalid, 4264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 4130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:42:24,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 1550 Invalid, 4264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 4130 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-28 14:42:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173003 states. [2022-01-28 14:42:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173003 to 122289. [2022-01-28 14:42:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122289 states, 122288 states have (on average 4.227585699332723) internal successors, (516983), 122288 states have internal predecessors, (516983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:30,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122289 states to 122289 states and 516983 transitions. [2022-01-28 14:42:30,935 INFO L78 Accepts]: Start accepts. Automaton has 122289 states and 516983 transitions. Word has length 33 [2022-01-28 14:42:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:42:30,935 INFO L470 AbstractCegarLoop]: Abstraction has 122289 states and 516983 transitions. [2022-01-28 14:42:30,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 122289 states and 516983 transitions. [2022-01-28 14:42:31,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:42:31,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:42:31,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:42:31,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-28 14:42:31,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:31,783 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:42:31,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:42:31,784 INFO L85 PathProgramCache]: Analyzing trace with hash 661686196, now seen corresponding path program 6 times [2022-01-28 14:42:31,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:42:31,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711028289] [2022-01-28 14:42:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:42:31,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:42:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:31,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:42:31,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711028289] [2022-01-28 14:42:31,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711028289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:42:31,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157143229] [2022-01-28 14:42:31,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:42:31,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:31,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:42:31,909 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) [2022-01-28 14:42:31,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-28 14:42:31,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:42:31,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:42:31,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-28 14:42:31,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:42:32,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:42:32,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:42:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:32,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:42:32,829 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2022-01-28 14:42:32,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 63 [2022-01-28 14:42:32,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:42:32,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 51 [2022-01-28 14:42:32,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:42:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2022-01-28 14:42:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:33,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157143229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:42:33,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:42:33,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 12] total 28 [2022-01-28 14:42:33,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032040377] [2022-01-28 14:42:33,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:42:33,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 14:42:33,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:42:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 14:42:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-01-28 14:42:33,133 INFO L87 Difference]: Start difference. First operand 122289 states and 516983 transitions. Second operand has 29 states, 29 states have (on average 3.0) internal successors, (87), 28 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) [2022-01-28 14:42:39,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:42:39,831 INFO L93 Difference]: Finished difference Result 199024 states and 809257 transitions. [2022-01-28 14:42:39,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-28 14:42:39,831 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 28 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) Word has length 33 [2022-01-28 14:42:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:42:41,511 INFO L225 Difference]: With dead ends: 199024 [2022-01-28 14:42:41,512 INFO L226 Difference]: Without dead ends: 198880 [2022-01-28 14:42:41,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5855 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1943, Invalid=14569, Unknown=0, NotChecked=0, Total=16512 [2022-01-28 14:42:41,512 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 760 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 4403 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 5931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 4403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1449 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:42:41,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 1644 Invalid, 5931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 4403 Invalid, 0 Unknown, 1449 Unchecked, 1.6s Time] [2022-01-28 14:42:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198880 states. [2022-01-28 14:42:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198880 to 132634. [2022-01-28 14:42:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132634 states, 132633 states have (on average 4.196308610979168) internal successors, (556569), 132633 states have internal predecessors, (556569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:42:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132634 states to 132634 states and 556569 transitions. [2022-01-28 14:42:48,690 INFO L78 Accepts]: Start accepts. Automaton has 132634 states and 556569 transitions. Word has length 33 [2022-01-28 14:42:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:42:48,690 INFO L470 AbstractCegarLoop]: Abstraction has 132634 states and 556569 transitions. [2022-01-28 14:42:48,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 28 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) [2022-01-28 14:42:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 132634 states and 556569 transitions. [2022-01-28 14:42:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:42:49,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:42:49,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:42:49,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-28 14:42:49,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:49,228 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:42:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:42:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash -121168790, now seen corresponding path program 7 times [2022-01-28 14:42:49,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:42:49,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904561405] [2022-01-28 14:42:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:42:49,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:42:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:49,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:42:49,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904561405] [2022-01-28 14:42:49,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904561405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:42:49,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716507519] [2022-01-28 14:42:49,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:42:49,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:42:49,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:42:49,353 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) [2022-01-28 14:42:49,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-28 14:42:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:42:49,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:42:49,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:42:49,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:42:49,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:42:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:49,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:42:49,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:42:49,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:42:49,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:42:49,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:42:49,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:42:49,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:42:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:42:49,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716507519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:42:49,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:42:49,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2022-01-28 14:42:49,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733000126] [2022-01-28 14:42:49,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:42:49,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:42:49,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:42:49,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:42:49,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:42:49,738 INFO L87 Difference]: Start difference. First operand 132634 states and 556569 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 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) [2022-01-28 14:42:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:42:52,848 INFO L93 Difference]: Finished difference Result 162414 states and 663886 transitions. [2022-01-28 14:42:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-28 14:42:52,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:42:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:42:53,711 INFO L225 Difference]: With dead ends: 162414 [2022-01-28 14:42:53,712 INFO L226 Difference]: Without dead ends: 161366 [2022-01-28 14:42:53,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2022-01-28 14:42:53,712 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 237 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 2632 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 2980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 14:42:53,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1178 Invalid, 2980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2632 Invalid, 0 Unknown, 335 Unchecked, 0.9s Time] [2022-01-28 14:42:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161366 states. [2022-01-28 14:42:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161366 to 128877. [2022-01-28 14:42:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128877 states, 128876 states have (on average 4.219521090040039) internal successors, (543795), 128876 states have internal predecessors, (543795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128877 states to 128877 states and 543795 transitions. [2022-01-28 14:43:00,218 INFO L78 Accepts]: Start accepts. Automaton has 128877 states and 543795 transitions. Word has length 33 [2022-01-28 14:43:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:43:00,218 INFO L470 AbstractCegarLoop]: Abstraction has 128877 states and 543795 transitions. [2022-01-28 14:43:00,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 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) [2022-01-28 14:43:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 128877 states and 543795 transitions. [2022-01-28 14:43:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:43:00,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:43:00,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:43:00,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-28 14:43:00,739 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,SelfDestructingSolverStorable83 [2022-01-28 14:43:00,740 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:43:00,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:43:00,741 INFO L85 PathProgramCache]: Analyzing trace with hash 35360068, now seen corresponding path program 10 times [2022-01-28 14:43:00,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:43:00,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808097355] [2022-01-28 14:43:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:43:00,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:43:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:43:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:01,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:43:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808097355] [2022-01-28 14:43:01,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808097355] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:43:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367831824] [2022-01-28 14:43:01,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:43:01,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:43:01,222 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) [2022-01-28 14:43:01,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-28 14:43:01,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:43:01,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:43:01,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:43:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:43:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:01,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:43:01,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:01,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:43:01,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:01,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-01-28 14:43:01,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:01,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:43:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:02,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367831824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:43:02,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:43:02,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-28 14:43:02,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756716720] [2022-01-28 14:43:02,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:43:02,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:43:02,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:43:02,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:43:02,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:43:02,037 INFO L87 Difference]: Start difference. First operand 128877 states and 543795 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-28 14:43:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:43:04,531 INFO L93 Difference]: Finished difference Result 141984 states and 587698 transitions. [2022-01-28 14:43:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 14:43:04,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) Word has length 33 [2022-01-28 14:43:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:43:05,302 INFO L225 Difference]: With dead ends: 141984 [2022-01-28 14:43:05,303 INFO L226 Difference]: Without dead ends: 140745 [2022-01-28 14:43:05,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 14:43:05,303 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 391 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 2659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 896 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:43:05,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 831 Invalid, 2659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1745 Invalid, 0 Unknown, 896 Unchecked, 0.6s Time] [2022-01-28 14:43:05,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140745 states. [2022-01-28 14:43:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140745 to 128813. [2022-01-28 14:43:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128813 states, 128812 states have (on average 4.221066360276993) internal successors, (543724), 128812 states have internal predecessors, (543724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128813 states to 128813 states and 543724 transitions. [2022-01-28 14:43:11,186 INFO L78 Accepts]: Start accepts. Automaton has 128813 states and 543724 transitions. Word has length 33 [2022-01-28 14:43:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:43:11,186 INFO L470 AbstractCegarLoop]: Abstraction has 128813 states and 543724 transitions. [2022-01-28 14:43:11,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-28 14:43:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 128813 states and 543724 transitions. [2022-01-28 14:43:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:43:11,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:43:11,850 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:43:11,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-28 14:43:12,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:12,063 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:43:12,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:43:12,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1281437150, now seen corresponding path program 11 times [2022-01-28 14:43:12,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:43:12,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545920692] [2022-01-28 14:43:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:43:12,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:43:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:43:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:12,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:43:12,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545920692] [2022-01-28 14:43:12,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545920692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:43:12,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460940689] [2022-01-28 14:43:12,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:43:12,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:12,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:43:12,276 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) [2022-01-28 14:43:12,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-28 14:43:12,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:43:12,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:43:12,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:43:12,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:43:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:12,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:43:12,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:12,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:43:13,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:13,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-01-28 14:43:13,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:13,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-01-28 14:43:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:13,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460940689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:43:13,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:43:13,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-01-28 14:43:13,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976105326] [2022-01-28 14:43:13,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:43:13,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-28 14:43:13,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:43:13,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-28 14:43:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-01-28 14:43:13,138 INFO L87 Difference]: Start difference. First operand 128813 states and 543724 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-28 14:43:16,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:43:16,278 INFO L93 Difference]: Finished difference Result 157035 states and 645870 transitions. [2022-01-28 14:43:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-28 14:43:16,279 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) Word has length 33 [2022-01-28 14:43:16,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:43:17,477 INFO L225 Difference]: With dead ends: 157035 [2022-01-28 14:43:17,477 INFO L226 Difference]: Without dead ends: 155501 [2022-01-28 14:43:17,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=497, Invalid=3163, Unknown=0, NotChecked=0, Total=3660 [2022-01-28 14:43:17,477 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 358 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 3805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 855 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 14:43:17,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 1197 Invalid, 3805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2912 Invalid, 0 Unknown, 855 Unchecked, 0.9s Time] [2022-01-28 14:43:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155501 states. [2022-01-28 14:43:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155501 to 128819. [2022-01-28 14:43:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128819 states, 128818 states have (on average 4.219169681255726) internal successors, (543505), 128818 states have internal predecessors, (543505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:23,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128819 states to 128819 states and 543505 transitions. [2022-01-28 14:43:23,400 INFO L78 Accepts]: Start accepts. Automaton has 128819 states and 543505 transitions. Word has length 33 [2022-01-28 14:43:23,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:43:23,400 INFO L470 AbstractCegarLoop]: Abstraction has 128819 states and 543505 transitions. [2022-01-28 14:43:23,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 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) [2022-01-28 14:43:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 128819 states and 543505 transitions. [2022-01-28 14:43:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:43:23,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:43:23,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:43:23,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-28 14:43:23,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:23,863 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:43:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:43:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1989825946, now seen corresponding path program 7 times [2022-01-28 14:43:23,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:43:23,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196608468] [2022-01-28 14:43:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:43:23,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:43:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:43:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:23,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:43:23,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196608468] [2022-01-28 14:43:23,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196608468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:43:23,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33538475] [2022-01-28 14:43:23,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:43:23,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:23,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:43:23,994 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) [2022-01-28 14:43:23,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-28 14:43:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:43:24,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:43:24,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:43:24,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-28 14:43:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:24,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:43:24,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:24,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-01-28 14:43:24,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:24,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:43:24,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:24,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:43:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:24,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33538475] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:43:24,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:43:24,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-01-28 14:43:24,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977554409] [2022-01-28 14:43:24,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:43:24,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:43:24,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:43:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:43:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:43:24,369 INFO L87 Difference]: Start difference. First operand 128819 states and 543505 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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) [2022-01-28 14:43:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:43:26,681 INFO L93 Difference]: Finished difference Result 140817 states and 581709 transitions. [2022-01-28 14:43:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-28 14:43:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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) Word has length 33 [2022-01-28 14:43:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:43:27,769 INFO L225 Difference]: With dead ends: 140817 [2022-01-28 14:43:27,769 INFO L226 Difference]: Without dead ends: 140455 [2022-01-28 14:43:27,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:43:27,769 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 343 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-28 14:43:27,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 872 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-28 14:43:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140455 states. [2022-01-28 14:43:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140455 to 129417. [2022-01-28 14:43:32,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129417 states, 129416 states have (on average 4.215406132162947) internal successors, (545541), 129416 states have internal predecessors, (545541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129417 states to 129417 states and 545541 transitions. [2022-01-28 14:43:33,703 INFO L78 Accepts]: Start accepts. Automaton has 129417 states and 545541 transitions. Word has length 33 [2022-01-28 14:43:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:43:33,703 INFO L470 AbstractCegarLoop]: Abstraction has 129417 states and 545541 transitions. [2022-01-28 14:43:33,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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) [2022-01-28 14:43:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 129417 states and 545541 transitions. [2022-01-28 14:43:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:43:34,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:43:34,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:43:34,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-28 14:43:34,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:34,211 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:43:34,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:43:34,212 INFO L85 PathProgramCache]: Analyzing trace with hash -165930146, now seen corresponding path program 8 times [2022-01-28 14:43:34,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:43:34,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004145824] [2022-01-28 14:43:34,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:43:34,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:43:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:43:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:34,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:43:34,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004145824] [2022-01-28 14:43:34,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004145824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:43:34,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567774370] [2022-01-28 14:43:34,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:43:34,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:34,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:43:34,356 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) [2022-01-28 14:43:34,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-28 14:43:34,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:43:34,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:43:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:43:34,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:43:34,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:43:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:34,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:43:34,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:34,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-28 14:43:34,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:34,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:43:34,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:34,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:43:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:34,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567774370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:43:34,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:43:34,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-01-28 14:43:34,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883930] [2022-01-28 14:43:34,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:43:34,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 14:43:34,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:43:34,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 14:43:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-28 14:43:34,734 INFO L87 Difference]: Start difference. First operand 129417 states and 545541 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:43:37,197 INFO L93 Difference]: Finished difference Result 143765 states and 592154 transitions. [2022-01-28 14:43:37,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 14:43:37,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:43:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:43:38,214 INFO L225 Difference]: With dead ends: 143765 [2022-01-28 14:43:38,214 INFO L226 Difference]: Without dead ends: 143555 [2022-01-28 14:43:38,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:43:38,215 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 429 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:43:38,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 870 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-28 14:43:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143555 states. [2022-01-28 14:43:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143555 to 129423. [2022-01-28 14:43:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129423 states, 129422 states have (on average 4.215674305759453) internal successors, (545601), 129422 states have internal predecessors, (545601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129423 states to 129423 states and 545601 transitions. [2022-01-28 14:43:44,160 INFO L78 Accepts]: Start accepts. Automaton has 129423 states and 545601 transitions. Word has length 33 [2022-01-28 14:43:44,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:43:44,160 INFO L470 AbstractCegarLoop]: Abstraction has 129423 states and 545601 transitions. [2022-01-28 14:43:44,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 129423 states and 545601 transitions. [2022-01-28 14:43:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:43:44,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:43:44,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:43:44,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-28 14:43:44,662 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,SelfDestructingSolverStorable87 [2022-01-28 14:43:44,663 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:43:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:43:44,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2057617790, now seen corresponding path program 5 times [2022-01-28 14:43:44,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:43:44,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026899627] [2022-01-28 14:43:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:43:44,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:43:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:43:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:45,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:43:45,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026899627] [2022-01-28 14:43:45,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026899627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:43:45,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108299836] [2022-01-28 14:43:45,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:43:45,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:45,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:43:45,202 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) [2022-01-28 14:43:45,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-28 14:43:45,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:43:45,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:43:45,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 14:43:45,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:43:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:45,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:43:45,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:45,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-28 14:43:45,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:45,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:43:45,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:45,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-01-28 14:43:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:45,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108299836] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:43:45,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:43:45,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-01-28 14:43:45,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609262664] [2022-01-28 14:43:45,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:43:45,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:43:45,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:43:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:43:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:43:45,980 INFO L87 Difference]: Start difference. First operand 129423 states and 545601 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:43:48,053 INFO L93 Difference]: Finished difference Result 135270 states and 563601 transitions. [2022-01-28 14:43:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:43:48,054 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:43:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:43:48,790 INFO L225 Difference]: With dead ends: 135270 [2022-01-28 14:43:48,790 INFO L226 Difference]: Without dead ends: 134417 [2022-01-28 14:43:48,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:43:48,790 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 497 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 14:43:48,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 653 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 14:43:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134417 states. [2022-01-28 14:43:53,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134417 to 129226. [2022-01-28 14:43:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129226 states, 129225 states have (on average 4.215786419036564) internal successors, (544785), 129225 states have internal predecessors, (544785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:54,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129226 states to 129226 states and 544785 transitions. [2022-01-28 14:43:54,445 INFO L78 Accepts]: Start accepts. Automaton has 129226 states and 544785 transitions. Word has length 33 [2022-01-28 14:43:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:43:54,445 INFO L470 AbstractCegarLoop]: Abstraction has 129226 states and 544785 transitions. [2022-01-28 14:43:54,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 26 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:43:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 129226 states and 544785 transitions. [2022-01-28 14:43:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:43:54,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:43:54,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:43:54,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-28 14:43:54,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-01-28 14:43:54,935 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:43:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:43:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1353221066, now seen corresponding path program 12 times [2022-01-28 14:43:54,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:43:54,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818816699] [2022-01-28 14:43:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:43:54,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:43:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:43:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:55,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:43:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818816699] [2022-01-28 14:43:55,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818816699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:43:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629433529] [2022-01-28 14:43:55,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:43:55,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:43:55,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:43:55,096 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) [2022-01-28 14:43:55,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-28 14:43:55,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:43:55,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:43:55,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:43:55,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:43:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:55,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:43:55,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:55,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:43:56,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:56,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2022-01-28 14:43:56,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:43:56,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-28 14:43:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:43:56,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629433529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:43:56,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:43:56,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-28 14:43:56,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892343776] [2022-01-28 14:43:56,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:43:56,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:43:56,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:43:56,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:43:56,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:43:56,265 INFO L87 Difference]: Start difference. First operand 129226 states and 544785 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) [2022-01-28 14:43:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:43:58,164 INFO L93 Difference]: Finished difference Result 138738 states and 576148 transitions. [2022-01-28 14:43:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 14:43:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) Word has length 33 [2022-01-28 14:43:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:43:59,268 INFO L225 Difference]: With dead ends: 138738 [2022-01-28 14:43:59,268 INFO L226 Difference]: Without dead ends: 138649 [2022-01-28 14:43:59,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 14:43:59,268 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 266 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:43:59,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 713 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 986 Invalid, 0 Unknown, 214 Unchecked, 0.4s Time] [2022-01-28 14:43:59,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138649 states. [2022-01-28 14:44:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138649 to 129300. [2022-01-28 14:44:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129300 states, 129299 states have (on average 4.214874051616795) internal successors, (544979), 129299 states have internal predecessors, (544979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129300 states to 129300 states and 544979 transitions. [2022-01-28 14:44:05,493 INFO L78 Accepts]: Start accepts. Automaton has 129300 states and 544979 transitions. Word has length 33 [2022-01-28 14:44:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:44:05,493 INFO L470 AbstractCegarLoop]: Abstraction has 129300 states and 544979 transitions. [2022-01-28 14:44:05,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) [2022-01-28 14:44:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 129300 states and 544979 transitions. [2022-01-28 14:44:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:44:06,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:44:06,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:44:06,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-28 14:44:06,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-28 14:44:06,599 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:44:06,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:44:06,600 INFO L85 PathProgramCache]: Analyzing trace with hash 461008036, now seen corresponding path program 13 times [2022-01-28 14:44:06,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:44:06,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350084353] [2022-01-28 14:44:06,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:44:06,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:44:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:44:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:44:06,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:44:06,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350084353] [2022-01-28 14:44:06,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350084353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:44:06,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733822088] [2022-01-28 14:44:06,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:44:06,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:06,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:44:06,799 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) [2022-01-28 14:44:06,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-28 14:44:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:44:06,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-28 14:44:06,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:44:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:44:07,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:44:07,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:07,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-01-28 14:44:07,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:07,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2022-01-28 14:44:07,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:07,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-01-28 14:44:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:44:07,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733822088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:44:07,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:44:07,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-01-28 14:44:07,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309965986] [2022-01-28 14:44:07,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:44:07,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 14:44:07,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:44:07,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 14:44:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-28 14:44:07,724 INFO L87 Difference]: Start difference. First operand 129300 states and 544979 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) [2022-01-28 14:44:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:44:10,675 INFO L93 Difference]: Finished difference Result 157834 states and 648387 transitions. [2022-01-28 14:44:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-28 14:44:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) Word has length 33 [2022-01-28 14:44:10,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:44:11,903 INFO L225 Difference]: With dead ends: 157834 [2022-01-28 14:44:11,903 INFO L226 Difference]: Without dead ends: 157667 [2022-01-28 14:44:11,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 13 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=373, Invalid=2279, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 14:44:11,907 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 450 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:44:11,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 913 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1615 Invalid, 0 Unknown, 422 Unchecked, 0.7s Time] [2022-01-28 14:44:12,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157667 states. [2022-01-28 14:44:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157667 to 130740. [2022-01-28 14:44:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130740 states, 130739 states have (on average 4.207046099480644) internal successors, (550025), 130739 states have internal predecessors, (550025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:18,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130740 states to 130740 states and 550025 transitions. [2022-01-28 14:44:18,107 INFO L78 Accepts]: Start accepts. Automaton has 130740 states and 550025 transitions. Word has length 33 [2022-01-28 14:44:18,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:44:18,108 INFO L470 AbstractCegarLoop]: Abstraction has 130740 states and 550025 transitions. [2022-01-28 14:44:18,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 21 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) [2022-01-28 14:44:18,108 INFO L276 IsEmpty]: Start isEmpty. Operand 130740 states and 550025 transitions. [2022-01-28 14:44:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:44:18,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:44:18,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:44:18,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-28 14:44:18,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:18,608 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:44:18,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:44:18,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1139762000, now seen corresponding path program 14 times [2022-01-28 14:44:18,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:44:18,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487535191] [2022-01-28 14:44:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:44:18,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:44:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:44:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:44:18,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:44:18,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487535191] [2022-01-28 14:44:18,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487535191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:44:18,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026762476] [2022-01-28 14:44:18,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:44:18,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:18,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:44:18,740 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) [2022-01-28 14:44:18,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-28 14:44:18,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:44:18,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:44:18,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:44:18,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:44:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:44:19,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:44:19,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:19,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-01-28 14:44:20,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:20,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2022-01-28 14:44:20,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:20,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2022-01-28 14:44:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:44:20,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026762476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:44:20,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:44:20,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 31 [2022-01-28 14:44:20,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409480038] [2022-01-28 14:44:20,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:44:20,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 14:44:20,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:44:20,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 14:44:20,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:44:20,909 INFO L87 Difference]: Start difference. First operand 130740 states and 550025 transitions. Second operand has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:44:28,003 INFO L93 Difference]: Finished difference Result 164272 states and 672041 transitions. [2022-01-28 14:44:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-28 14:44:28,003 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:44:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:44:28,880 INFO L225 Difference]: With dead ends: 164272 [2022-01-28 14:44:28,880 INFO L226 Difference]: Without dead ends: 160705 [2022-01-28 14:44:28,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1156, Invalid=8156, Unknown=0, NotChecked=0, Total=9312 [2022-01-28 14:44:28,884 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 1231 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 5243 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 7235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 5243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1845 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:44:28,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1231 Valid, 1984 Invalid, 7235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 5243 Invalid, 0 Unknown, 1845 Unchecked, 2.0s Time] [2022-01-28 14:44:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160705 states. [2022-01-28 14:44:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160705 to 132006. [2022-01-28 14:44:34,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132006 states, 132005 states have (on average 4.211514715351691) internal successors, (555941), 132005 states have internal predecessors, (555941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132006 states to 132006 states and 555941 transitions. [2022-01-28 14:44:35,597 INFO L78 Accepts]: Start accepts. Automaton has 132006 states and 555941 transitions. Word has length 33 [2022-01-28 14:44:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:44:35,597 INFO L470 AbstractCegarLoop]: Abstraction has 132006 states and 555941 transitions. [2022-01-28 14:44:35,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.03125) internal successors, (97), 31 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 132006 states and 555941 transitions. [2022-01-28 14:44:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:44:35,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:44:35,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:44:35,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-28 14:44:36,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:36,132 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:44:36,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:44:36,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1058243580, now seen corresponding path program 8 times [2022-01-28 14:44:36,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:44:36,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798031577] [2022-01-28 14:44:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:44:36,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:44:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:44:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:44:36,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:44:36,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798031577] [2022-01-28 14:44:36,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798031577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:44:36,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784975837] [2022-01-28 14:44:36,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:44:36,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:36,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:44:36,258 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) [2022-01-28 14:44:36,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-28 14:44:36,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:44:36,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:44:36,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:44:36,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:44:36,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:44:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:44:36,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:44:36,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:36,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:44:36,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:36,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:44:36,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:36,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:44:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:44:36,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784975837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:44:36,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:44:36,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-28 14:44:36,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406770382] [2022-01-28 14:44:36,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:44:36,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:44:36,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:44:36,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:44:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:44:36,631 INFO L87 Difference]: Start difference. First operand 132006 states and 555941 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 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) [2022-01-28 14:44:39,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:44:39,298 INFO L93 Difference]: Finished difference Result 160956 states and 660571 transitions. [2022-01-28 14:44:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-28 14:44:39,299 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:44:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:44:40,876 INFO L225 Difference]: With dead ends: 160956 [2022-01-28 14:44:40,876 INFO L226 Difference]: Without dead ends: 160281 [2022-01-28 14:44:40,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 14:44:40,877 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 306 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:44:40,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 807 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:44:41,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160281 states. [2022-01-28 14:44:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160281 to 131719. [2022-01-28 14:44:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131719 states, 131718 states have (on average 4.212195751529784) internal successors, (554822), 131718 states have internal predecessors, (554822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:44:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131719 states to 131719 states and 554822 transitions. [2022-01-28 14:44:47,729 INFO L78 Accepts]: Start accepts. Automaton has 131719 states and 554822 transitions. Word has length 33 [2022-01-28 14:44:47,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:44:47,729 INFO L470 AbstractCegarLoop]: Abstraction has 131719 states and 554822 transitions. [2022-01-28 14:44:47,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 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) [2022-01-28 14:44:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 131719 states and 554822 transitions. [2022-01-28 14:44:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:44:48,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:44:48,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:44:48,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-28 14:44:48,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:48,239 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:44:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:44:48,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1067294788, now seen corresponding path program 9 times [2022-01-28 14:44:48,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:44:48,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142271813] [2022-01-28 14:44:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:44:48,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:44:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:44:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:44:48,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:44:48,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142271813] [2022-01-28 14:44:48,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142271813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:44:48,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384572707] [2022-01-28 14:44:48,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:44:48,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:44:48,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:44:48,350 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) [2022-01-28 14:44:48,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-28 14:44:48,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:44:48,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:44:48,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 14:44:48,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:44:48,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:44:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:44:49,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:44:49,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:49,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:44:49,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:49,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 60 [2022-01-28 14:44:50,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:44:50,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2022-01-28 14:44:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:44:50,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384572707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:44:50,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:44:50,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 14] total 34 [2022-01-28 14:44:50,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612475732] [2022-01-28 14:44:50,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:44:50,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-28 14:44:50,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:44:50,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-28 14:44:50,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 14:44:50,456 INFO L87 Difference]: Start difference. First operand 131719 states and 554822 transitions. Second operand has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:45:23,249 INFO L93 Difference]: Finished difference Result 407306 states and 1634877 transitions. [2022-01-28 14:45:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 391 states. [2022-01-28 14:45:23,250 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:45:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:45:26,493 INFO L225 Difference]: With dead ends: 407306 [2022-01-28 14:45:26,493 INFO L226 Difference]: Without dead ends: 407234 [2022-01-28 14:45:26,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 89 SyntacticMatches, 32 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70114 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=16822, Invalid=141184, Unknown=0, NotChecked=0, Total=158006 [2022-01-28 14:45:26,501 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 1570 mSDsluCounter, 6673 mSDsCounter, 0 mSdLazyCounter, 7836 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 4276 SdHoareTripleChecker+Invalid, 16344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 7836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8369 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:45:26,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 4276 Invalid, 16344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 7836 Invalid, 0 Unknown, 8369 Unchecked, 3.6s Time] [2022-01-28 14:45:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407234 states. [2022-01-28 14:45:39,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407234 to 150268. [2022-01-28 14:45:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150268 states, 150267 states have (on average 4.249788709430547) internal successors, (638603), 150267 states have internal predecessors, (638603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150268 states to 150268 states and 638603 transitions. [2022-01-28 14:45:40,584 INFO L78 Accepts]: Start accepts. Automaton has 150268 states and 638603 transitions. Word has length 33 [2022-01-28 14:45:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:45:40,584 INFO L470 AbstractCegarLoop]: Abstraction has 150268 states and 638603 transitions. [2022-01-28 14:45:40,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7714285714285714) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 150268 states and 638603 transitions. [2022-01-28 14:45:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:45:41,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:45:41,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:45:41,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-28 14:45:41,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:45:41,504 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:45:41,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:45:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash 284439802, now seen corresponding path program 10 times [2022-01-28 14:45:41,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:45:41,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61896745] [2022-01-28 14:45:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:45:41,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:45:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:45:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:45:41,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:45:41,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61896745] [2022-01-28 14:45:41,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61896745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:45:41,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619045687] [2022-01-28 14:45:41,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:45:41,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:45:41,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:45:41,614 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) [2022-01-28 14:45:41,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-28 14:45:41,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:45:41,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:45:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:45:41,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:45:41,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:45:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:45:41,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:45:41,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:45:41,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:45:41,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:45:41,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:45:41,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:45:41,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:45:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:45:41,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619045687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:45:41,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:45:41,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-01-28 14:45:41,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504876038] [2022-01-28 14:45:41,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:45:41,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:45:41,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:45:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:45:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:45:41,944 INFO L87 Difference]: Start difference. First operand 150268 states and 638603 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 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) [2022-01-28 14:45:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:45:44,570 INFO L93 Difference]: Finished difference Result 162806 states and 678350 transitions. [2022-01-28 14:45:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-28 14:45:44,570 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:45:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:45:46,135 INFO L225 Difference]: With dead ends: 162806 [2022-01-28 14:45:46,136 INFO L226 Difference]: Without dead ends: 161697 [2022-01-28 14:45:46,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:45:46,136 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 392 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:45:46,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 812 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1890 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:45:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161697 states. [2022-01-28 14:45:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161697 to 147998. [2022-01-28 14:45:52,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147998 states, 147997 states have (on average 4.262552619309851) internal successors, (630845), 147997 states have internal predecessors, (630845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:45:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147998 states to 147998 states and 630845 transitions. [2022-01-28 14:45:54,377 INFO L78 Accepts]: Start accepts. Automaton has 147998 states and 630845 transitions. Word has length 33 [2022-01-28 14:45:54,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:45:54,378 INFO L470 AbstractCegarLoop]: Abstraction has 147998 states and 630845 transitions. [2022-01-28 14:45:54,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 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) [2022-01-28 14:45:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 147998 states and 630845 transitions. [2022-01-28 14:45:54,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:45:54,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:45:54,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:45:54,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-28 14:45:55,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:45:55,198 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:45:55,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:45:55,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1428166344, now seen corresponding path program 11 times [2022-01-28 14:45:55,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:45:55,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143183237] [2022-01-28 14:45:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:45:55,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:45:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:45:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:45:55,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:45:55,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143183237] [2022-01-28 14:45:55,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143183237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:45:55,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9179310] [2022-01-28 14:45:55,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:45:55,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:45:55,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:45:55,285 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) [2022-01-28 14:45:55,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-28 14:45:55,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:45:55,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:45:55,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:45:55,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:45:55,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:45:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:45:55,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:45:55,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:45:55,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:45:55,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:45:55,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:45:55,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:45:55,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:45:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:45:55,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9179310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:45:55,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:45:55,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-28 14:45:55,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420530241] [2022-01-28 14:45:55,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:45:55,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:45:55,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:45:55,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:45:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:45:55,637 INFO L87 Difference]: Start difference. First operand 147998 states and 630845 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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) [2022-01-28 14:45:58,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:45:58,214 INFO L93 Difference]: Finished difference Result 160853 states and 674872 transitions. [2022-01-28 14:45:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-28 14:45:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:45:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:45:59,528 INFO L225 Difference]: With dead ends: 160853 [2022-01-28 14:45:59,528 INFO L226 Difference]: Without dead ends: 160853 [2022-01-28 14:45:59,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 14:45:59,529 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 431 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:45:59,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 819 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 14:45:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160853 states. [2022-01-28 14:46:04,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160853 to 148580. [2022-01-28 14:46:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148580 states, 148579 states have (on average 4.260979007800564) internal successors, (633092), 148579 states have internal predecessors, (633092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148580 states to 148580 states and 633092 transitions. [2022-01-28 14:46:06,392 INFO L78 Accepts]: Start accepts. Automaton has 148580 states and 633092 transitions. Word has length 33 [2022-01-28 14:46:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:06,392 INFO L470 AbstractCegarLoop]: Abstraction has 148580 states and 633092 transitions. [2022-01-28 14:46:06,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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) [2022-01-28 14:46:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 148580 states and 633092 transitions. [2022-01-28 14:46:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:46:06,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:06,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:06,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-28 14:46:07,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:07,012 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:46:07,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1783853826, now seen corresponding path program 9 times [2022-01-28 14:46:07,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:07,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706269308] [2022-01-28 14:46:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:07,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:07,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:07,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706269308] [2022-01-28 14:46:07,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706269308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:07,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519303223] [2022-01-28 14:46:07,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:46:07,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:07,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:07,160 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) [2022-01-28 14:46:07,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-28 14:46:07,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 14:46:07,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:07,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:46:07,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:07,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:46:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:07,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:07,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:07,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:46:07,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:07,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:46:07,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:07,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:46:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:07,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519303223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:07,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:07,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-28 14:46:07,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087438977] [2022-01-28 14:46:07,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:07,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:46:07,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:46:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:46:07,866 INFO L87 Difference]: Start difference. First operand 148580 states and 633092 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2022-01-28 14:46:10,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:46:10,525 INFO L93 Difference]: Finished difference Result 166787 states and 692273 transitions. [2022-01-28 14:46:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:46:10,526 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:46:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:46:11,437 INFO L225 Difference]: With dead ends: 166787 [2022-01-28 14:46:11,438 INFO L226 Difference]: Without dead ends: 166271 [2022-01-28 14:46:11,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:46:11,438 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 448 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:46:11,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 766 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:46:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166271 states. [2022-01-28 14:46:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166271 to 147723. [2022-01-28 14:46:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147723 states, 147722 states have (on average 4.265288853386767) internal successors, (630077), 147722 states have internal predecessors, (630077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147723 states to 147723 states and 630077 transitions. [2022-01-28 14:46:18,789 INFO L78 Accepts]: Start accepts. Automaton has 147723 states and 630077 transitions. Word has length 33 [2022-01-28 14:46:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:18,789 INFO L470 AbstractCegarLoop]: Abstraction has 147723 states and 630077 transitions. [2022-01-28 14:46:18,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 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) [2022-01-28 14:46:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 147723 states and 630077 transitions. [2022-01-28 14:46:19,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:46:19,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:19,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:19,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-28 14:46:19,690 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,SelfDestructingSolverStorable96 [2022-01-28 14:46:19,690 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:46:19,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:19,690 INFO L85 PathProgramCache]: Analyzing trace with hash -472347488, now seen corresponding path program 10 times [2022-01-28 14:46:19,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:19,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389752211] [2022-01-28 14:46:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:19,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:19,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:19,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389752211] [2022-01-28 14:46:19,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389752211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:19,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864439811] [2022-01-28 14:46:19,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:46:19,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:19,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:19,844 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) [2022-01-28 14:46:19,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-28 14:46:19,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:46:19,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:19,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:46:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:20,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:46:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:20,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:20,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:20,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:46:20,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:20,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:46:20,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:20,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-01-28 14:46:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:20,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864439811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:20,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:20,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-01-28 14:46:20,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594994103] [2022-01-28 14:46:20,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:20,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:46:20,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:46:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:46:20,264 INFO L87 Difference]: Start difference. First operand 147723 states and 630077 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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) [2022-01-28 14:46:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:46:23,093 INFO L93 Difference]: Finished difference Result 170647 states and 710041 transitions. [2022-01-28 14:46:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-28 14:46:23,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:46:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:46:24,361 INFO L225 Difference]: With dead ends: 170647 [2022-01-28 14:46:24,361 INFO L226 Difference]: Without dead ends: 169967 [2022-01-28 14:46:24,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 14:46:24,362 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 399 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 2107 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:46:24,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 850 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:46:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169967 states. [2022-01-28 14:46:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169967 to 146566. [2022-01-28 14:46:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146566 states, 146565 states have (on average 4.263050523658445) internal successors, (624814), 146565 states have internal predecessors, (624814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146566 states to 146566 states and 624814 transitions. [2022-01-28 14:46:31,422 INFO L78 Accepts]: Start accepts. Automaton has 146566 states and 624814 transitions. Word has length 33 [2022-01-28 14:46:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:31,422 INFO L470 AbstractCegarLoop]: Abstraction has 146566 states and 624814 transitions. [2022-01-28 14:46:31,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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) [2022-01-28 14:46:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 146566 states and 624814 transitions. [2022-01-28 14:46:31,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:46:31,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:31,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:31,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-28 14:46:31,930 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,SelfDestructingSolverStorable97 [2022-01-28 14:46:31,931 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:46:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash -805336814, now seen corresponding path program 12 times [2022-01-28 14:46:31,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:31,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717444241] [2022-01-28 14:46:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:31,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:32,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:32,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717444241] [2022-01-28 14:46:32,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717444241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:32,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611342327] [2022-01-28 14:46:32,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:46:32,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:32,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:32,067 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) [2022-01-28 14:46:32,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-28 14:46:32,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:46:32,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:32,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:46:32,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:32,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-28 14:46:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:32,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:32,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:32,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:46:32,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:32,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:46:32,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:32,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:46:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:32,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611342327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:32,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:32,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-01-28 14:46:32,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102527397] [2022-01-28 14:46:32,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:32,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 14:46:32,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 14:46:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-28 14:46:32,721 INFO L87 Difference]: Start difference. First operand 146566 states and 624814 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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) [2022-01-28 14:46:35,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:46:35,070 INFO L93 Difference]: Finished difference Result 156993 states and 660366 transitions. [2022-01-28 14:46:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 14:46:35,084 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:46:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:46:35,919 INFO L225 Difference]: With dead ends: 156993 [2022-01-28 14:46:35,919 INFO L226 Difference]: Without dead ends: 156993 [2022-01-28 14:46:35,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-01-28 14:46:35,920 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 461 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:46:35,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 516 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:46:36,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156993 states. [2022-01-28 14:46:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156993 to 146912. [2022-01-28 14:46:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146912 states, 146911 states have (on average 4.262294858792058) internal successors, (626178), 146911 states have internal predecessors, (626178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146912 states to 146912 states and 626178 transitions. [2022-01-28 14:46:43,001 INFO L78 Accepts]: Start accepts. Automaton has 146912 states and 626178 transitions. Word has length 33 [2022-01-28 14:46:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:43,001 INFO L470 AbstractCegarLoop]: Abstraction has 146912 states and 626178 transitions. [2022-01-28 14:46:43,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 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) [2022-01-28 14:46:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 146912 states and 626178 transitions. [2022-01-28 14:46:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:46:43,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:43,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:43,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-28 14:46:43,879 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,SelfDestructingSolverStorable98 [2022-01-28 14:46:43,879 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:46:43,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:43,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1491631234, now seen corresponding path program 11 times [2022-01-28 14:46:43,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:43,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140393485] [2022-01-28 14:46:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:43,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:44,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140393485] [2022-01-28 14:46:44,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140393485] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:44,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604450669] [2022-01-28 14:46:44,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:46:44,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:44,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:44,043 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) [2022-01-28 14:46:44,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-28 14:46:44,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:46:44,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:44,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:46:44,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:44,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:46:44,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:46:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:44,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:44,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:44,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-01-28 14:46:44,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:44,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:46:44,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:44,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:46:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:44,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604450669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:44,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:44,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2022-01-28 14:46:44,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644425027] [2022-01-28 14:46:44,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:44,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 14:46:44,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:44,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 14:46:44,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:46:44,502 INFO L87 Difference]: Start difference. First operand 146912 states and 626178 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 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) [2022-01-28 14:46:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:46:47,048 INFO L93 Difference]: Finished difference Result 162389 states and 676783 transitions. [2022-01-28 14:46:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 14:46:47,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 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) Word has length 33 [2022-01-28 14:46:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:46:48,423 INFO L225 Difference]: With dead ends: 162389 [2022-01-28 14:46:48,424 INFO L226 Difference]: Without dead ends: 162013 [2022-01-28 14:46:48,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-28 14:46:48,424 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 344 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 14:46:48,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 660 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1726 Invalid, 0 Unknown, 268 Unchecked, 0.4s Time] [2022-01-28 14:46:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162013 states. [2022-01-28 14:46:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162013 to 146504. [2022-01-28 14:46:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146504 states, 146503 states have (on average 4.263264233496925) internal successors, (624581), 146503 states have internal predecessors, (624581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:46:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146504 states to 146504 states and 624581 transitions. [2022-01-28 14:46:55,837 INFO L78 Accepts]: Start accepts. Automaton has 146504 states and 624581 transitions. Word has length 33 [2022-01-28 14:46:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:46:55,838 INFO L470 AbstractCegarLoop]: Abstraction has 146504 states and 624581 transitions. [2022-01-28 14:46:55,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 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) [2022-01-28 14:46:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 146504 states and 624581 transitions. [2022-01-28 14:46:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:46:56,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:46:56,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:46:56,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-28 14:46:56,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:56,796 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:46:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:46:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2030903570, now seen corresponding path program 12 times [2022-01-28 14:46:56,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:46:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894301008] [2022-01-28 14:46:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:46:56,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:46:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:46:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:56,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:46:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894301008] [2022-01-28 14:46:56,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894301008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:46:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992136764] [2022-01-28 14:46:56,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:46:56,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:46:56,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:46:56,986 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) [2022-01-28 14:46:56,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-28 14:46:57,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:46:57,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:46:57,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-28 14:46:57,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:46:57,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 14:46:57,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:46:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:57,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:46:57,679 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 14:46:57,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 62 [2022-01-28 14:46:57,861 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 14:46:57,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 72 [2022-01-28 14:46:57,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:46:57,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2022-01-28 14:46:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:46:58,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992136764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:46:58,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:46:58,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 12] total 26 [2022-01-28 14:46:58,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263237619] [2022-01-28 14:46:58,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:46:58,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 14:46:58,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:46:58,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 14:46:58,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:46:58,265 INFO L87 Difference]: Start difference. First operand 146504 states and 624581 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 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) [2022-01-28 14:47:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:47:04,808 INFO L93 Difference]: Finished difference Result 200932 states and 810736 transitions. [2022-01-28 14:47:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-28 14:47:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 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) Word has length 33 [2022-01-28 14:47:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:47:06,032 INFO L225 Difference]: With dead ends: 200932 [2022-01-28 14:47:06,032 INFO L226 Difference]: Without dead ends: 200551 [2022-01-28 14:47:06,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2368 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1135, Invalid=6697, Unknown=0, NotChecked=0, Total=7832 [2022-01-28 14:47:06,033 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 937 mSDsluCounter, 1938 mSDsCounter, 0 mSdLazyCounter, 3818 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 3941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 14:47:06,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 1367 Invalid, 3941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3818 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-28 14:47:06,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200551 states. [2022-01-28 14:47:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200551 to 149253. [2022-01-28 14:47:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149253 states, 149252 states have (on average 4.2575911880577815) internal successors, (635454), 149252 states have internal predecessors, (635454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:47:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149253 states to 149253 states and 635454 transitions. [2022-01-28 14:47:14,802 INFO L78 Accepts]: Start accepts. Automaton has 149253 states and 635454 transitions. Word has length 33 [2022-01-28 14:47:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:47:14,803 INFO L470 AbstractCegarLoop]: Abstraction has 149253 states and 635454 transitions. [2022-01-28 14:47:14,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 26 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) [2022-01-28 14:47:14,803 INFO L276 IsEmpty]: Start isEmpty. Operand 149253 states and 635454 transitions. [2022-01-28 14:47:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-28 14:47:15,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:47:15,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:47:15,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-28 14:47:15,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:47:15,343 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 14:47:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:47:15,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2078069064, now seen corresponding path program 13 times [2022-01-28 14:47:15,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:47:15,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584639949] [2022-01-28 14:47:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:47:15,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:47:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:47:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:47:15,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:47:15,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584639949] [2022-01-28 14:47:15,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584639949] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:47:15,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460366804] [2022-01-28 14:47:15,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:47:15,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:47:15,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:47:15,441 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) [2022-01-28 14:47:15,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-28 14:47:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:47:15,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 14:47:15,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:47:15,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-28 14:47:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:47:15,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:47:15,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:47:15,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-01-28 14:47:15,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:47:15,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:47:15,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 14:47:15,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-01-28 14:47:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:47:15,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460366804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:47:15,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:47:15,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-28 14:47:15,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502477797] [2022-01-28 14:47:15,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:47:15,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 14:47:15,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:47:15,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 14:47:15,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-28 14:47:15,793 INFO L87 Difference]: Start difference. First operand 149253 states and 635454 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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) [2022-01-28 14:47:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:47:18,196 INFO L93 Difference]: Finished difference Result 161666 states and 675751 transitions. [2022-01-28 14:47:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 14:47:18,197 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-28 14:47:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:47:19,404 INFO L225 Difference]: With dead ends: 161666 [2022-01-28 14:47:19,405 INFO L226 Difference]: Without dead ends: 161242 [2022-01-28 14:47:19,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-28 14:47:19,405 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 416 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-28 14:47:19,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 595 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-28 14:47:19,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161242 states. Received shutdown request... [2022-01-28 14:47:20,495 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-28 14:47:20,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-28 14:47:20,536 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-28 14:47:20,536 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-28 14:47:20,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-28 14:47:20,707 WARN L594 AbstractCegarLoop]: Verification canceled: while executing MinimizeSevpa. [2022-01-28 14:47:20,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-28 14:47:20,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-28 14:47:20,709 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-28 14:47:20,712 INFO L732 BasicCegarLoop]: Path program histogram: [25, 14, 13, 12, 6, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-01-28 14:47:20,713 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-28 14:47:20,713 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-28 14:47:20,715 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 02:47:20 BasicIcfg [2022-01-28 14:47:20,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-28 14:47:20,717 INFO L158 Benchmark]: Toolchain (without parser) took 693750.90ms. Allocated memory was 200.3MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 164.6MB in the beginning and 5.3GB in the end (delta: -5.2GB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2022-01-28 14:47:20,717 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 200.3MB. Free memory was 165.9MB in the beginning and 165.7MB in the end (delta: 147.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 14:47:20,717 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.31ms. Allocated memory is still 200.3MB. Free memory was 164.5MB in the beginning and 163.0MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-01-28 14:47:20,717 INFO L158 Benchmark]: Boogie Preprocessor took 12.34ms. Allocated memory is still 200.3MB. Free memory was 163.0MB in the beginning and 162.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 14:47:20,717 INFO L158 Benchmark]: RCFGBuilder took 231.42ms. Allocated memory is still 200.3MB. Free memory was 162.0MB in the beginning and 152.4MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-28 14:47:20,717 INFO L158 Benchmark]: TraceAbstraction took 693459.68ms. Allocated memory was 200.3MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 151.9MB in the beginning and 5.3GB in the end (delta: -5.2GB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2022-01-28 14:47:20,718 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 0.13ms. Allocated memory is still 200.3MB. Free memory was 165.9MB in the beginning and 165.7MB in the end (delta: 147.1kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.31ms. Allocated memory is still 200.3MB. Free memory was 164.5MB in the beginning and 163.0MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.34ms. Allocated memory is still 200.3MB. Free memory was 163.0MB in the beginning and 162.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 231.42ms. Allocated memory is still 200.3MB. Free memory was 162.0MB in the beginning and 152.4MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 693459.68ms. Allocated memory was 200.3MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 151.9MB in the beginning and 5.3GB in the end (delta: -5.2GB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 51 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 693.4s, OverallIterations: 102, TraceHistogramMax: 3, PathProgramHistogramMax: 25, EmptinessCheckTime: 19.2s, AutomataDifference: 288.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44896 SdHoareTripleChecker+Valid, 63.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44896 mSDsluCounter, 70308 SdHoareTripleChecker+Invalid, 52.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 23254 IncrementalHoareTripleChecker+Unchecked, 96742 mSDsCounter, 4115 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 172401 IncrementalHoareTripleChecker+Invalid, 199770 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4115 mSolverCounterUnsat, 6732 mSDtfsCounter, 172401 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9293 GetRequests, 4506 SyntacticMatches, 245 SemanticMatches, 4542 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236671 ImplicationChecksByTransitivity, 106.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=150268occurred in iteration=94, InterpolantAutomatonStates: 4027, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 293.6s AutomataMinimizationTime, 102 MinimizatonAttempts, 1649764 StatesRemovedByMinimization, 99 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 67.3s InterpolantComputationTime, 5733 NumberOfCodeBlocks, 5718 NumberOfCodeBlocksAsserted, 319 NumberOfCheckSat, 8194 ConstructedInterpolants, 342 QuantifiedInterpolants, 118768 SizeOfPredicates, 973 NumberOfNonLiveVariables, 7275 ConjunctsInSsa, 1375 ConjunctsInUnsatCore, 287 InterpolantComputations, 10 PerfectInterpolantSequences, 623/2900 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown