/usr/bin/java -Xmx16000000000 -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/unroll-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 04:16:02,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 04:16:02,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 04:16:02,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 04:16:02,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 04:16:02,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 04:16:02,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 04:16:02,249 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 [2022-01-18 04:16:02,274 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 04:16:02,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 04:16:02,274 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 04:16:02,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 04:16:02,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 04:16:02,275 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 04:16:02,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 04:16:02,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 04:16:02,275 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 04:16:02,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 04:16:02,276 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 04:16:02,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 04:16:02,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 04:16:02,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 04:16:02,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 04:16:02,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 04:16:02,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 04:16:02,276 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 04:16:02,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 04:16:02,277 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 04:16:02,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 04:16:02,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 04:16:02,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 04:16:02,277 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 04:16:02,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 04:16:02,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 04:16:02,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 04:16:02,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 04:16:02,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 04:16:02,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 04:16:02,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 04:16:02,278 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 04:16:02,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 04:16:02,278 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 04:16:02,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 04:16:02,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 04:16:02,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 04:16:02,467 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 04:16:02,470 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 04:16:02,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl [2022-01-18 04:16:02,472 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl' [2022-01-18 04:16:02,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 04:16:02,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 04:16:02,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 04:16:02,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 04:16:02,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 04:16:02,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:16:02" (1/1) ... [2022-01-18 04:16:02,506 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:16:02" (1/1) ... [2022-01-18 04:16:02,511 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 04:16:02,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 04:16:02,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 04:16:02,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 04:16:02,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 04:16:02,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:16:02" (1/1) ... [2022-01-18 04:16:02,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:16:02" (1/1) ... [2022-01-18 04:16:02,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:16:02" (1/1) ... [2022-01-18 04:16:02,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:16:02" (1/1) ... [2022-01-18 04:16:02,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:16:02" (1/1) ... [2022-01-18 04:16:02,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:16:02" (1/1) ... [2022-01-18 04:16:02,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:16:02" (1/1) ... [2022-01-18 04:16:02,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 04:16:02,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 04:16:02,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 04:16:02,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 04:16:02,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:16:02" (1/1) ... [2022-01-18 04:16:02,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 04:16:02,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:02,551 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) [2022-01-18 04:16:02,557 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 [2022-01-18 04:16:02,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 04:16:02,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 04:16:02,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 04:16:02,593 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 04:16:02,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 04:16:02,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 04:16:02,594 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 04:16:02,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 04:16:02,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 04:16:02,595 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 04:16:02,627 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 04:16:02,628 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 04:16:02,694 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 04:16:02,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 04:16:02,720 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-18 04:16:02,721 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-01-18 04:16:02,721 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-01-18 04:16:02,722 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:16:02 BoogieIcfgContainer [2022-01-18 04:16:02,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 04:16:02,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 04:16:02,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 04:16:02,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 04:16:02,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:16:02" (1/2) ... [2022-01-18 04:16:02,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab4819d and model type unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:16:02, skipping insertion in model container [2022-01-18 04:16:02,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:16:02" (2/2) ... [2022-01-18 04:16:02,738 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.bpl [2022-01-18 04:16:02,741 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 04:16:02,741 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 04:16:02,741 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 04:16:02,742 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 04:16:02,775 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 04:16:02,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 04:16:02,856 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 [2022-01-18 04:16:02,857 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 04:16:02,875 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2022-01-18 04:16:02,888 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2022-01-18 04:16:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2022-01-18 04:16:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-18 04:16:02,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:02,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:02,894 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash 842249075, now seen corresponding path program 1 times [2022-01-18 04:16:02,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:02,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124606062] [2022-01-18 04:16:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:02,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:02,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:02,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124606062] [2022-01-18 04:16:02,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124606062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:16:02,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:16:02,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 04:16:02,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189695619] [2022-01-18 04:16:02,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:16:02,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 04:16:02,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:03,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 04:16:03,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 04:16:03,018 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:03,052 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2022-01-18 04:16:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 04:16:03,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-18 04:16:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:03,064 INFO L225 Difference]: With dead ends: 22 [2022-01-18 04:16:03,064 INFO L226 Difference]: Without dead ends: 19 [2022-01-18 04:16:03,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 04:16:03,071 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:03,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-18 04:16:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-18 04:16:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2022-01-18 04:16:03,112 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2022-01-18 04:16:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:03,112 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2022-01-18 04:16:03,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2022-01-18 04:16:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 04:16:03,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:03,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:03,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 04:16:03,115 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:03,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:03,118 INFO L85 PathProgramCache]: Analyzing trace with hash 340649728, now seen corresponding path program 1 times [2022-01-18 04:16:03,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:03,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700570147] [2022-01-18 04:16:03,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:03,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:03,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:03,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700570147] [2022-01-18 04:16:03,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700570147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:16:03,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:16:03,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 04:16:03,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664725967] [2022-01-18 04:16:03,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:16:03,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 04:16:03,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 04:16:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:16:03,174 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:03,214 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2022-01-18 04:16:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 04:16:03,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-18 04:16:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:03,215 INFO L225 Difference]: With dead ends: 19 [2022-01-18 04:16:03,215 INFO L226 Difference]: Without dead ends: 15 [2022-01-18 04:16:03,215 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 [2022-01-18 04:16:03,216 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:03,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-18 04:16:03,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-18 04:16:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 25 transitions. [2022-01-18 04:16:03,219 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 25 transitions. Word has length 10 [2022-01-18 04:16:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:03,219 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 25 transitions. [2022-01-18 04:16:03,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,220 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 25 transitions. [2022-01-18 04:16:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 04:16:03,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:03,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:03,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 04:16:03,220 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:03,221 INFO L85 PathProgramCache]: Analyzing trace with hash 141890046, now seen corresponding path program 1 times [2022-01-18 04:16:03,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:03,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57173871] [2022-01-18 04:16:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:03,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:03,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:03,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57173871] [2022-01-18 04:16:03,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57173871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:03,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963656401] [2022-01-18 04:16:03,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:03,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:03,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:03,253 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) [2022-01-18 04:16:03,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 04:16:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 04:16:03,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:03,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:03,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963656401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:03,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:03,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-01-18 04:16:03,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888324118] [2022-01-18 04:16:03,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:03,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 04:16:03,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:03,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 04:16:03,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 04:16:03,367 INFO L87 Difference]: Start difference. First operand 15 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:03,410 INFO L93 Difference]: Finished difference Result 18 states and 31 transitions. [2022-01-18 04:16:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 04:16:03,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-18 04:16:03,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:03,411 INFO L225 Difference]: With dead ends: 18 [2022-01-18 04:16:03,411 INFO L226 Difference]: Without dead ends: 18 [2022-01-18 04:16:03,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 04:16:03,415 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:03,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:03,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-18 04:16:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-18 04:16:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2022-01-18 04:16:03,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2022-01-18 04:16:03,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:03,428 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2022-01-18 04:16:03,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,428 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2022-01-18 04:16:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 04:16:03,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:03,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:03,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:03,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:03,643 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:03,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:03,644 INFO L85 PathProgramCache]: Analyzing trace with hash 175957154, now seen corresponding path program 2 times [2022-01-18 04:16:03,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:03,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413232182] [2022-01-18 04:16:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:03,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:03,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:03,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413232182] [2022-01-18 04:16:03,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413232182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 04:16:03,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 04:16:03,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 04:16:03,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489928412] [2022-01-18 04:16:03,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 04:16:03,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 04:16:03,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:03,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 04:16:03,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:16:03,684 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:03,708 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2022-01-18 04:16:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 04:16:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-18 04:16:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:03,710 INFO L225 Difference]: With dead ends: 20 [2022-01-18 04:16:03,710 INFO L226 Difference]: Without dead ends: 20 [2022-01-18 04:16:03,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 04:16:03,714 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:03,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:03,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-18 04:16:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-18 04:16:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2022-01-18 04:16:03,717 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2022-01-18 04:16:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:03,717 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2022-01-18 04:16:03,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2022-01-18 04:16:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-18 04:16:03,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:03,718 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:03,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 04:16:03,718 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:03,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:03,718 INFO L85 PathProgramCache]: Analyzing trace with hash 104356309, now seen corresponding path program 1 times [2022-01-18 04:16:03,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:03,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560585743] [2022-01-18 04:16:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:03,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:03,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:03,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:03,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560585743] [2022-01-18 04:16:03,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560585743] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145938882] [2022-01-18 04:16:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:03,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:03,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:03,767 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) [2022-01-18 04:16:03,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 04:16:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:03,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 04:16:03,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:03,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:03,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145938882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:03,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:03,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-01-18 04:16:03,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719075761] [2022-01-18 04:16:03,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:03,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 04:16:03,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:03,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 04:16:03,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 04:16:03,845 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2022-01-18 04:16:03,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:03,876 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2022-01-18 04:16:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 04:16:03,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 11 [2022-01-18 04:16:03,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:03,877 INFO L225 Difference]: With dead ends: 28 [2022-01-18 04:16:03,877 INFO L226 Difference]: Without dead ends: 28 [2022-01-18 04:16:03,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 04:16:03,878 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:03,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 11 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:03,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-18 04:16:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-18 04:16:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-01-18 04:16:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2022-01-18 04:16:03,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 11 [2022-01-18 04:16:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:03,881 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2022-01-18 04:16:03,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2022-01-18 04:16:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2022-01-18 04:16:03,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 04:16:03,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:03,882 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:03,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:04,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:04,096 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:04,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1924485941, now seen corresponding path program 2 times [2022-01-18 04:16:04,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:04,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11475378] [2022-01-18 04:16:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:04,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:04,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:04,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11475378] [2022-01-18 04:16:04,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11475378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:04,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525637980] [2022-01-18 04:16:04,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:16:04,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:04,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:04,184 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) [2022-01-18 04:16:04,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 04:16:04,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:16:04,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:04,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 04:16:04,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:04,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:04,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525637980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:04,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:04,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-01-18 04:16:04,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688962467] [2022-01-18 04:16:04,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:04,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 04:16:04,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 04:16:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:16:04,337 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:04,398 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2022-01-18 04:16:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 04:16:04,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 04:16:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:04,399 INFO L225 Difference]: With dead ends: 32 [2022-01-18 04:16:04,399 INFO L226 Difference]: Without dead ends: 32 [2022-01-18 04:16:04,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:16:04,402 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:04,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-18 04:16:04,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-18 04:16:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2022-01-18 04:16:04,415 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2022-01-18 04:16:04,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:04,415 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2022-01-18 04:16:04,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2022-01-18 04:16:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:16:04,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:04,416 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:04,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:04,616 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 [2022-01-18 04:16:04,617 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:04,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1958638656, now seen corresponding path program 3 times [2022-01-18 04:16:04,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:04,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251410639] [2022-01-18 04:16:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:04,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:04,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251410639] [2022-01-18 04:16:04,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251410639] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307163474] [2022-01-18 04:16:04,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:16:04,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:04,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:04,655 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) [2022-01-18 04:16:04,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 04:16:04,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:16:04,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:04,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:16:04,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:04,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:16:04,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 04:16:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:04,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:05,107 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 04:16:05,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 04:16:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:13,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307163474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:13,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:13,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-01-18 04:16:13,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878994659] [2022-01-18 04:16:13,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:13,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:13,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:13,498 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:13,622 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2022-01-18 04:16:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:16:13,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:16:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:13,622 INFO L225 Difference]: With dead ends: 80 [2022-01-18 04:16:13,623 INFO L226 Difference]: Without dead ends: 77 [2022-01-18 04:16:13,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:13,623 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:13,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 40 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-18 04:16:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2022-01-18 04:16:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.186046511627907) internal successors, (94), 43 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) [2022-01-18 04:16:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 94 transitions. [2022-01-18 04:16:13,627 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 94 transitions. Word has length 14 [2022-01-18 04:16:13,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:13,627 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 94 transitions. [2022-01-18 04:16:13,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 94 transitions. [2022-01-18 04:16:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:16:13,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:13,628 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:13,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-18 04:16:13,843 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 [2022-01-18 04:16:13,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash -617160214, now seen corresponding path program 4 times [2022-01-18 04:16:13,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:13,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712553594] [2022-01-18 04:16:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:13,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:13,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712553594] [2022-01-18 04:16:13,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712553594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273831373] [2022-01-18 04:16:13,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:16:13,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:13,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:13,879 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) [2022-01-18 04:16:13,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 04:16:13,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:16:13,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:13,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:16:13,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:13,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:16:13,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 04:16:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:14,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:14,207 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 04:16:14,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 04:16:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:20,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273831373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:20,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:20,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-01-18 04:16:20,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650329112] [2022-01-18 04:16:20,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:20,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:20,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:20,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:20,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:20,230 INFO L87 Difference]: Start difference. First operand 44 states and 94 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-01-18 04:16:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:20,361 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2022-01-18 04:16:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:16:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 14 [2022-01-18 04:16:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:20,362 INFO L225 Difference]: With dead ends: 89 [2022-01-18 04:16:20,362 INFO L226 Difference]: Without dead ends: 86 [2022-01-18 04:16:20,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:20,363 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:20,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 41 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-18 04:16:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2022-01-18 04:16:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 119 transitions. [2022-01-18 04:16:20,366 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 119 transitions. Word has length 14 [2022-01-18 04:16:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:20,367 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 119 transitions. [2022-01-18 04:16:20,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-01-18 04:16:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 119 transitions. [2022-01-18 04:16:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:16:20,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:20,368 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:20,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-18 04:16:20,583 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 [2022-01-18 04:16:20,583 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1947955938, now seen corresponding path program 5 times [2022-01-18 04:16:20,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:20,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458544748] [2022-01-18 04:16:20,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:20,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:20,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:20,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:20,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458544748] [2022-01-18 04:16:20,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458544748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:20,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618507191] [2022-01-18 04:16:20,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:16:20,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:20,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:20,615 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) [2022-01-18 04:16:20,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 04:16:20,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:16:20,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:20,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:16:20,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:20,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:16:20,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 04:16:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:20,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:20,912 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 04:16:20,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 04:16:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:22,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618507191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:22,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:22,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-01-18 04:16:22,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647485668] [2022-01-18 04:16:22,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:22,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:22,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:22,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:22,632 INFO L87 Difference]: Start difference. First operand 51 states and 119 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-01-18 04:16:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:22,757 INFO L93 Difference]: Finished difference Result 98 states and 200 transitions. [2022-01-18 04:16:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:16:22,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 14 [2022-01-18 04:16:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:22,758 INFO L225 Difference]: With dead ends: 98 [2022-01-18 04:16:22,758 INFO L226 Difference]: Without dead ends: 95 [2022-01-18 04:16:22,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:22,759 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:22,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 41 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-18 04:16:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2022-01-18 04:16:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2022-01-18 04:16:22,763 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 14 [2022-01-18 04:16:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:22,763 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2022-01-18 04:16:22,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-01-18 04:16:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2022-01-18 04:16:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:16:22,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:22,764 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:22,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:22,975 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 [2022-01-18 04:16:22,976 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:22,976 INFO L85 PathProgramCache]: Analyzing trace with hash -137821974, now seen corresponding path program 6 times [2022-01-18 04:16:22,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:22,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391382190] [2022-01-18 04:16:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:22,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:23,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:23,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391382190] [2022-01-18 04:16:23,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391382190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:23,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553955325] [2022-01-18 04:16:23,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:16:23,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:23,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:23,010 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) [2022-01-18 04:16:23,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 04:16:23,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:16:23,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:23,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:16:23,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:23,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:16:23,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 04:16:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:23,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:23,328 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 04:16:23,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 04:16:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:28,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553955325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:28,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:28,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2022-01-18 04:16:28,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902074103] [2022-01-18 04:16:28,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:28,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:16:28,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:28,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:16:28,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:16:28,074 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:28,198 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2022-01-18 04:16:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:16:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:16:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:28,199 INFO L225 Difference]: With dead ends: 108 [2022-01-18 04:16:28,199 INFO L226 Difference]: Without dead ends: 105 [2022-01-18 04:16:28,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:16:28,199 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:28,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-18 04:16:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2022-01-18 04:16:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.656716417910448) internal successors, (178), 67 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 178 transitions. [2022-01-18 04:16:28,203 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 178 transitions. Word has length 14 [2022-01-18 04:16:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:28,204 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 178 transitions. [2022-01-18 04:16:28,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 178 transitions. [2022-01-18 04:16:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 04:16:28,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:28,204 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:28,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 04:16:28,422 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 [2022-01-18 04:16:28,422 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:28,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:28,422 INFO L85 PathProgramCache]: Analyzing trace with hash -372427806, now seen corresponding path program 7 times [2022-01-18 04:16:28,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:28,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755961672] [2022-01-18 04:16:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:28,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:28,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:28,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755961672] [2022-01-18 04:16:28,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755961672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:28,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378863735] [2022-01-18 04:16:28,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:16:28,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:28,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:28,460 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) [2022-01-18 04:16:28,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 04:16:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:28,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 04:16:28,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:28,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:16:28,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2022-01-18 04:16:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:28,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:28,795 INFO L353 Elim1Store]: treesize reduction 20, result has 91.1 percent of original size [2022-01-18 04:16:28,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 19 treesize of output 232 [2022-01-18 04:16:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:33,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378863735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:33,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:33,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2022-01-18 04:16:33,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648762062] [2022-01-18 04:16:33,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:33,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 04:16:33,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:33,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 04:16:33,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:16:33,729 INFO L87 Difference]: Start difference. First operand 68 states and 178 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:33,843 INFO L93 Difference]: Finished difference Result 119 states and 267 transitions. [2022-01-18 04:16:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:16:33,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 04:16:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:33,845 INFO L225 Difference]: With dead ends: 119 [2022-01-18 04:16:33,845 INFO L226 Difference]: Without dead ends: 116 [2022-01-18 04:16:33,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:16:33,845 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:33,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-18 04:16:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2022-01-18 04:16:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.730769230769231) internal successors, (213), 78 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:33,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 213 transitions. [2022-01-18 04:16:33,852 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 213 transitions. Word has length 14 [2022-01-18 04:16:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:33,852 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 213 transitions. [2022-01-18 04:16:33,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 213 transitions. [2022-01-18 04:16:33,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:33,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:33,853 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:33,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:34,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-18 04:16:34,064 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:34,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash 588988371, now seen corresponding path program 8 times [2022-01-18 04:16:34,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:34,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835444735] [2022-01-18 04:16:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:34,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:34,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:34,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835444735] [2022-01-18 04:16:34,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835444735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:34,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525628014] [2022-01-18 04:16:34,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:16:34,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:34,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:34,103 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) [2022-01-18 04:16:34,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 04:16:34,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:16:34,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:34,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:34,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:34,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:34,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525628014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:34,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:34,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 04:16:34,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025229775] [2022-01-18 04:16:34,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:34,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:34,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:34,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:34,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:34,247 INFO L87 Difference]: Start difference. First operand 79 states and 213 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:34,384 INFO L93 Difference]: Finished difference Result 156 states and 339 transitions. [2022-01-18 04:16:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 04:16:34,384 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:34,385 INFO L225 Difference]: With dead ends: 156 [2022-01-18 04:16:34,385 INFO L226 Difference]: Without dead ends: 151 [2022-01-18 04:16:34,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:16:34,386 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 85 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:34,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 31 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:34,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-18 04:16:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 91. [2022-01-18 04:16:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.7777777777777777) internal successors, (250), 90 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 250 transitions. [2022-01-18 04:16:34,397 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 250 transitions. Word has length 15 [2022-01-18 04:16:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:34,398 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 250 transitions. [2022-01-18 04:16:34,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 250 transitions. [2022-01-18 04:16:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:34,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:34,402 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:34,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:34,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:34,618 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:34,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:34,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1277594475, now seen corresponding path program 9 times [2022-01-18 04:16:34,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:34,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010368043] [2022-01-18 04:16:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:34,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:34,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:34,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010368043] [2022-01-18 04:16:34,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010368043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:34,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850850996] [2022-01-18 04:16:34,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:16:34,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:34,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:34,663 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) [2022-01-18 04:16:34,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 04:16:34,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:16:34,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:34,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:34,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:34,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:34,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850850996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:34,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:34,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 04:16:34,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218187457] [2022-01-18 04:16:34,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:34,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:34,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:34,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:34,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:34,792 INFO L87 Difference]: Start difference. First operand 91 states and 250 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:34,943 INFO L93 Difference]: Finished difference Result 166 states and 350 transitions. [2022-01-18 04:16:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:16:34,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:34,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:34,944 INFO L225 Difference]: With dead ends: 166 [2022-01-18 04:16:34,944 INFO L226 Difference]: Without dead ends: 164 [2022-01-18 04:16:34,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:16:34,945 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:34,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 53 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-18 04:16:34,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 98. [2022-01-18 04:16:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.731958762886598) internal successors, (265), 97 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 265 transitions. [2022-01-18 04:16:34,950 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 265 transitions. Word has length 15 [2022-01-18 04:16:34,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:34,950 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 265 transitions. [2022-01-18 04:16:34,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:34,950 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 265 transitions. [2022-01-18 04:16:34,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:34,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:34,951 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:34,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:35,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 04:16:35,155 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:35,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1350497361, now seen corresponding path program 10 times [2022-01-18 04:16:35,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:35,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144559942] [2022-01-18 04:16:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:35,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:35,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:35,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144559942] [2022-01-18 04:16:35,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144559942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:35,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159121032] [2022-01-18 04:16:35,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:16:35,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:35,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:35,207 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) [2022-01-18 04:16:35,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 04:16:35,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:16:35,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:35,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:35,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:35,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:35,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159121032] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:35,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:35,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:35,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264871387] [2022-01-18 04:16:35,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:35,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:35,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:35,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:35,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:35,330 INFO L87 Difference]: Start difference. First operand 98 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:35,451 INFO L93 Difference]: Finished difference Result 130 states and 308 transitions. [2022-01-18 04:16:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 04:16:35,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:35,452 INFO L225 Difference]: With dead ends: 130 [2022-01-18 04:16:35,452 INFO L226 Difference]: Without dead ends: 129 [2022-01-18 04:16:35,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:16:35,453 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:35,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 23 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-18 04:16:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 99. [2022-01-18 04:16:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2022-01-18 04:16:35,456 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2022-01-18 04:16:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:35,456 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2022-01-18 04:16:35,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2022-01-18 04:16:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:35,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:35,456 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:35,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:35,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 04:16:35,657 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:35,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:35,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2078385983, now seen corresponding path program 11 times [2022-01-18 04:16:35,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:35,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418529715] [2022-01-18 04:16:35,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:35,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:35,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418529715] [2022-01-18 04:16:35,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418529715] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457796447] [2022-01-18 04:16:35,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:16:35,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:35,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:35,693 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) [2022-01-18 04:16:35,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 04:16:35,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:16:35,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:35,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:35,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:35,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:35,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457796447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:35,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:35,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:35,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629044944] [2022-01-18 04:16:35,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:35,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:35,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:35,809 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:35,858 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2022-01-18 04:16:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:16:35,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:35,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:35,859 INFO L225 Difference]: With dead ends: 166 [2022-01-18 04:16:35,859 INFO L226 Difference]: Without dead ends: 166 [2022-01-18 04:16:35,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:35,859 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 69 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:35,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 25 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-18 04:16:35,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 99. [2022-01-18 04:16:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2022-01-18 04:16:35,862 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2022-01-18 04:16:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:35,862 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2022-01-18 04:16:35,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2022-01-18 04:16:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:35,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:35,863 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:35,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:36,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 04:16:36,071 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1951365271, now seen corresponding path program 12 times [2022-01-18 04:16:36,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:36,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036467079] [2022-01-18 04:16:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:36,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:36,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:36,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036467079] [2022-01-18 04:16:36,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036467079] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:36,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140217619] [2022-01-18 04:16:36,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:16:36,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:36,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:36,105 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) [2022-01-18 04:16:36,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 04:16:36,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:16:36,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:36,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:36,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:36,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140217619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:36,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:36,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:36,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206917105] [2022-01-18 04:16:36,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:36,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:36,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:36,214 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:36,539 INFO L93 Difference]: Finished difference Result 286 states and 534 transitions. [2022-01-18 04:16:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:16:36,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:36,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:36,541 INFO L225 Difference]: With dead ends: 286 [2022-01-18 04:16:36,541 INFO L226 Difference]: Without dead ends: 282 [2022-01-18 04:16:36,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=508, Invalid=974, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:16:36,542 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 179 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:36,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 41 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-18 04:16:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 99. [2022-01-18 04:16:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.683673469387755) internal successors, (263), 98 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 263 transitions. [2022-01-18 04:16:36,545 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 263 transitions. Word has length 15 [2022-01-18 04:16:36,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:36,545 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 263 transitions. [2022-01-18 04:16:36,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 263 transitions. [2022-01-18 04:16:36,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:36,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:36,546 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:36,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:36,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 04:16:36,752 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:36,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:36,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1288277193, now seen corresponding path program 13 times [2022-01-18 04:16:36,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:36,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132200419] [2022-01-18 04:16:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:36,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:36,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:36,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132200419] [2022-01-18 04:16:36,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132200419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:36,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128337084] [2022-01-18 04:16:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:16:36,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:36,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:36,793 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) [2022-01-18 04:16:36,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 04:16:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:36,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:36,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:36,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:36,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128337084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:36,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:36,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:36,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079460950] [2022-01-18 04:16:36,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:36,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:36,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:36,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:36,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:36,916 INFO L87 Difference]: Start difference. First operand 99 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:37,015 INFO L93 Difference]: Finished difference Result 176 states and 372 transitions. [2022-01-18 04:16:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 04:16:37,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:37,016 INFO L225 Difference]: With dead ends: 176 [2022-01-18 04:16:37,016 INFO L226 Difference]: Without dead ends: 176 [2022-01-18 04:16:37,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:16:37,016 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:37,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 51 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:37,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-18 04:16:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 104. [2022-01-18 04:16:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6893203883495147) internal successors, (277), 103 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 277 transitions. [2022-01-18 04:16:37,019 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 277 transitions. Word has length 15 [2022-01-18 04:16:37,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:37,019 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 277 transitions. [2022-01-18 04:16:37,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 277 transitions. [2022-01-18 04:16:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:37,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:37,020 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:37,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:37,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:37,227 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash -379353783, now seen corresponding path program 14 times [2022-01-18 04:16:37,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:37,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178815783] [2022-01-18 04:16:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:37,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:37,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:37,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178815783] [2022-01-18 04:16:37,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178815783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:37,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875316857] [2022-01-18 04:16:37,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:16:37,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:37,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:37,259 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) [2022-01-18 04:16:37,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 04:16:37,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:16:37,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:37,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:37,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:37,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:37,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875316857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:37,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:37,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:37,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406202924] [2022-01-18 04:16:37,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:37,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:37,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:37,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:37,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:37,374 INFO L87 Difference]: Start difference. First operand 104 states and 277 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:37,486 INFO L93 Difference]: Finished difference Result 179 states and 373 transitions. [2022-01-18 04:16:37,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:16:37,486 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:37,487 INFO L225 Difference]: With dead ends: 179 [2022-01-18 04:16:37,487 INFO L226 Difference]: Without dead ends: 178 [2022-01-18 04:16:37,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:16:37,487 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 89 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:37,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 39 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-18 04:16:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 104. [2022-01-18 04:16:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.679611650485437) internal successors, (276), 103 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 276 transitions. [2022-01-18 04:16:37,490 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 276 transitions. Word has length 15 [2022-01-18 04:16:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:37,490 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 276 transitions. [2022-01-18 04:16:37,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 276 transitions. [2022-01-18 04:16:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:37,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:37,491 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:37,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:37,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 04:16:37,699 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash 486730169, now seen corresponding path program 15 times [2022-01-18 04:16:37,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:37,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674499368] [2022-01-18 04:16:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:37,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:37,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:37,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674499368] [2022-01-18 04:16:37,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674499368] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:37,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770085456] [2022-01-18 04:16:37,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:16:37,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:37,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:37,738 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) [2022-01-18 04:16:37,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 04:16:37,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:16:37,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:37,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:37,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:37,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770085456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:37,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:37,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:37,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549727459] [2022-01-18 04:16:37,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:37,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:37,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:37,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:37,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:37,860 INFO L87 Difference]: Start difference. First operand 104 states and 276 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:38,036 INFO L93 Difference]: Finished difference Result 279 states and 534 transitions. [2022-01-18 04:16:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:16:38,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:38,037 INFO L225 Difference]: With dead ends: 279 [2022-01-18 04:16:38,037 INFO L226 Difference]: Without dead ends: 279 [2022-01-18 04:16:38,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=230, Invalid=322, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:16:38,038 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 154 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:38,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 57 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:38,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-18 04:16:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 104. [2022-01-18 04:16:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.679611650485437) internal successors, (276), 103 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 276 transitions. [2022-01-18 04:16:38,041 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 276 transitions. Word has length 15 [2022-01-18 04:16:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:38,041 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 276 transitions. [2022-01-18 04:16:38,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 276 transitions. [2022-01-18 04:16:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:38,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:38,042 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:38,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:38,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:38,251 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:38,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:38,252 INFO L85 PathProgramCache]: Analyzing trace with hash 475952871, now seen corresponding path program 16 times [2022-01-18 04:16:38,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:38,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294085777] [2022-01-18 04:16:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:38,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:38,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:38,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294085777] [2022-01-18 04:16:38,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294085777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:38,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463269693] [2022-01-18 04:16:38,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:16:38,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:38,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:38,289 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) [2022-01-18 04:16:38,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 04:16:38,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:16:38,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:38,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:38,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:38,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:38,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463269693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:38,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:38,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 04:16:38,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436147474] [2022-01-18 04:16:38,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:38,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:38,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:38,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:38,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:38,396 INFO L87 Difference]: Start difference. First operand 104 states and 276 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:38,535 INFO L93 Difference]: Finished difference Result 160 states and 352 transitions. [2022-01-18 04:16:38,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:16:38,536 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:38,536 INFO L225 Difference]: With dead ends: 160 [2022-01-18 04:16:38,536 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 04:16:38,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:16:38,537 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:38,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 49 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 04:16:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2022-01-18 04:16:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6634615384615383) internal successors, (277), 104 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:38,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 277 transitions. [2022-01-18 04:16:38,540 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 277 transitions. Word has length 15 [2022-01-18 04:16:38,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:38,540 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 277 transitions. [2022-01-18 04:16:38,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 277 transitions. [2022-01-18 04:16:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:38,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:38,540 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:38,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:38,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:38,755 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:38,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:38,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2097623819, now seen corresponding path program 17 times [2022-01-18 04:16:38,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:38,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860408341] [2022-01-18 04:16:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:38,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:38,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:38,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860408341] [2022-01-18 04:16:38,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860408341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:38,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930982760] [2022-01-18 04:16:38,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:16:38,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:38,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:38,795 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) [2022-01-18 04:16:38,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 04:16:38,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:16:38,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:38,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:38,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:38,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:38,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930982760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:38,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:38,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 04:16:38,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802610979] [2022-01-18 04:16:38,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:38,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:38,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:38,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:38,912 INFO L87 Difference]: Start difference. First operand 105 states and 277 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:39,120 INFO L93 Difference]: Finished difference Result 293 states and 557 transitions. [2022-01-18 04:16:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:16:39,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:39,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:39,121 INFO L225 Difference]: With dead ends: 293 [2022-01-18 04:16:39,121 INFO L226 Difference]: Without dead ends: 293 [2022-01-18 04:16:39,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=275, Invalid=427, Unknown=0, NotChecked=0, Total=702 [2022-01-18 04:16:39,122 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 167 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:39,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 41 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:39,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-18 04:16:39,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 105. [2022-01-18 04:16:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6634615384615383) internal successors, (277), 104 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 277 transitions. [2022-01-18 04:16:39,126 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 277 transitions. Word has length 15 [2022-01-18 04:16:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:39,126 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 277 transitions. [2022-01-18 04:16:39,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:39,126 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 277 transitions. [2022-01-18 04:16:39,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:39,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:39,126 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:39,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:39,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:39,335 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:39,336 INFO L85 PathProgramCache]: Analyzing trace with hash 257824113, now seen corresponding path program 18 times [2022-01-18 04:16:39,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:39,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392014353] [2022-01-18 04:16:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:39,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:39,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:39,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392014353] [2022-01-18 04:16:39,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392014353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:39,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215581506] [2022-01-18 04:16:39,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:16:39,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:39,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:39,373 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) [2022-01-18 04:16:39,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 04:16:39,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:16:39,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:39,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:39,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:39,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215581506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:39,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:39,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:39,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177758793] [2022-01-18 04:16:39,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:39,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:39,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:39,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:39,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:39,502 INFO L87 Difference]: Start difference. First operand 105 states and 277 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:39,829 INFO L93 Difference]: Finished difference Result 298 states and 545 transitions. [2022-01-18 04:16:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:16:39,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:39,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:39,830 INFO L225 Difference]: With dead ends: 298 [2022-01-18 04:16:39,830 INFO L226 Difference]: Without dead ends: 292 [2022-01-18 04:16:39,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=502, Invalid=980, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:16:39,831 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 200 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:39,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 37 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:39,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-18 04:16:39,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 105. [2022-01-18 04:16:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.6346153846153846) internal successors, (274), 104 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 274 transitions. [2022-01-18 04:16:39,834 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 274 transitions. Word has length 15 [2022-01-18 04:16:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:39,834 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 274 transitions. [2022-01-18 04:16:39,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 274 transitions. [2022-01-18 04:16:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:39,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:39,835 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:39,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:40,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:40,043 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:40,044 INFO L85 PathProgramCache]: Analyzing trace with hash 920912191, now seen corresponding path program 19 times [2022-01-18 04:16:40,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:40,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484197854] [2022-01-18 04:16:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:40,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:40,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:40,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484197854] [2022-01-18 04:16:40,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484197854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:40,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802424065] [2022-01-18 04:16:40,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:16:40,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:40,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:40,085 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) [2022-01-18 04:16:40,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 04:16:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:40,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:40,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:40,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:40,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802424065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:40,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:40,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:40,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271703378] [2022-01-18 04:16:40,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:40,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:40,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:40,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:40,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:40,220 INFO L87 Difference]: Start difference. First operand 105 states and 274 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:40,287 INFO L93 Difference]: Finished difference Result 185 states and 391 transitions. [2022-01-18 04:16:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 04:16:40,287 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:40,288 INFO L225 Difference]: With dead ends: 185 [2022-01-18 04:16:40,288 INFO L226 Difference]: Without dead ends: 185 [2022-01-18 04:16:40,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-18 04:16:40,289 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:40,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 41 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-18 04:16:40,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 110. [2022-01-18 04:16:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6605504587155964) internal successors, (290), 109 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 290 transitions. [2022-01-18 04:16:40,291 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 290 transitions. Word has length 15 [2022-01-18 04:16:40,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:40,291 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 290 transitions. [2022-01-18 04:16:40,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 290 transitions. [2022-01-18 04:16:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:40,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:40,292 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:40,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:40,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 04:16:40,508 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:40,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:40,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1829835601, now seen corresponding path program 20 times [2022-01-18 04:16:40,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:40,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945056108] [2022-01-18 04:16:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:40,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:40,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:40,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945056108] [2022-01-18 04:16:40,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945056108] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:40,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278431803] [2022-01-18 04:16:40,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:16:40,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:40,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:40,546 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) [2022-01-18 04:16:40,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 04:16:40,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:16:40,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:40,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:40,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:40,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:40,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278431803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:40,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:40,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:40,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306416967] [2022-01-18 04:16:40,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:40,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:40,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:40,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:40,656 INFO L87 Difference]: Start difference. First operand 110 states and 290 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:40,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:40,781 INFO L93 Difference]: Finished difference Result 190 states and 395 transitions. [2022-01-18 04:16:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:16:40,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:40,782 INFO L225 Difference]: With dead ends: 190 [2022-01-18 04:16:40,782 INFO L226 Difference]: Without dead ends: 189 [2022-01-18 04:16:40,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:16:40,783 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:40,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:40,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-18 04:16:40,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 110. [2022-01-18 04:16:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6513761467889907) internal successors, (289), 109 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 289 transitions. [2022-01-18 04:16:40,786 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 289 transitions. Word has length 15 [2022-01-18 04:16:40,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:40,786 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 289 transitions. [2022-01-18 04:16:40,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:40,787 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 289 transitions. [2022-01-18 04:16:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:40,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:40,787 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:40,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:40,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 04:16:40,995 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1599047743, now seen corresponding path program 21 times [2022-01-18 04:16:40,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:40,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015469657] [2022-01-18 04:16:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:40,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:41,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:41,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015469657] [2022-01-18 04:16:41,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015469657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:41,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065703670] [2022-01-18 04:16:41,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:16:41,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:41,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:41,037 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) [2022-01-18 04:16:41,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 04:16:41,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:16:41,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:41,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:41,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:41,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:41,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065703670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:41,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:41,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:41,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781512676] [2022-01-18 04:16:41,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:41,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:41,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:41,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:41,175 INFO L87 Difference]: Start difference. First operand 110 states and 289 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:41,367 INFO L93 Difference]: Finished difference Result 275 states and 525 transitions. [2022-01-18 04:16:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:16:41,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:41,368 INFO L225 Difference]: With dead ends: 275 [2022-01-18 04:16:41,368 INFO L226 Difference]: Without dead ends: 275 [2022-01-18 04:16:41,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=329, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:16:41,369 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 169 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:41,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 49 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-18 04:16:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 110. [2022-01-18 04:16:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6513761467889907) internal successors, (289), 109 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 289 transitions. [2022-01-18 04:16:41,379 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 289 transitions. Word has length 15 [2022-01-18 04:16:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:41,379 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 289 transitions. [2022-01-18 04:16:41,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 289 transitions. [2022-01-18 04:16:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:41,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:41,379 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:41,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:41,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:41,580 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:41,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1609825041, now seen corresponding path program 22 times [2022-01-18 04:16:41,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:41,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191694506] [2022-01-18 04:16:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:41,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:41,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:41,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191694506] [2022-01-18 04:16:41,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191694506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:41,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987036345] [2022-01-18 04:16:41,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:16:41,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:41,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:41,616 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) [2022-01-18 04:16:41,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 04:16:41,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:16:41,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:41,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:41,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:41,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:41,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987036345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:41,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:41,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 04:16:41,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857630766] [2022-01-18 04:16:41,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:41,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:41,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:41,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:41,743 INFO L87 Difference]: Start difference. First operand 110 states and 289 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:41,878 INFO L93 Difference]: Finished difference Result 195 states and 401 transitions. [2022-01-18 04:16:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 04:16:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:41,879 INFO L225 Difference]: With dead ends: 195 [2022-01-18 04:16:41,879 INFO L226 Difference]: Without dead ends: 193 [2022-01-18 04:16:41,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2022-01-18 04:16:41,879 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 81 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:41,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 49 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-18 04:16:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 110. [2022-01-18 04:16:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6422018348623855) internal successors, (288), 109 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 288 transitions. [2022-01-18 04:16:41,882 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 288 transitions. Word has length 15 [2022-01-18 04:16:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:41,882 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 288 transitions. [2022-01-18 04:16:41,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 288 transitions. [2022-01-18 04:16:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:41,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:41,883 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:41,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:42,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:42,099 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:42,099 INFO L85 PathProgramCache]: Analyzing trace with hash 111565565, now seen corresponding path program 23 times [2022-01-18 04:16:42,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:42,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43211178] [2022-01-18 04:16:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:42,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:42,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:42,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43211178] [2022-01-18 04:16:42,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43211178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:42,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930339677] [2022-01-18 04:16:42,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:16:42,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:42,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:42,139 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) [2022-01-18 04:16:42,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 04:16:42,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:16:42,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:42,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:42,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:42,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930339677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:42,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:42,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 04:16:42,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391491518] [2022-01-18 04:16:42,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:42,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:42,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:42,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:42,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:42,251 INFO L87 Difference]: Start difference. First operand 110 states and 288 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:42,471 INFO L93 Difference]: Finished difference Result 294 states and 549 transitions. [2022-01-18 04:16:42,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 04:16:42,472 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:42,473 INFO L225 Difference]: With dead ends: 294 [2022-01-18 04:16:42,473 INFO L226 Difference]: Without dead ends: 294 [2022-01-18 04:16:42,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=475, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:16:42,473 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 136 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:42,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 79 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-18 04:16:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 110. [2022-01-18 04:16:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.6422018348623855) internal successors, (288), 109 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 288 transitions. [2022-01-18 04:16:42,476 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 288 transitions. Word has length 15 [2022-01-18 04:16:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:42,477 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 288 transitions. [2022-01-18 04:16:42,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 288 transitions. [2022-01-18 04:16:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:42,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:42,477 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:42,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:42,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 04:16:42,687 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:42,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:42,688 INFO L85 PathProgramCache]: Analyzing trace with hash -865122543, now seen corresponding path program 24 times [2022-01-18 04:16:42,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:42,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741920516] [2022-01-18 04:16:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:42,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:42,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:42,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741920516] [2022-01-18 04:16:42,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741920516] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:42,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640447471] [2022-01-18 04:16:42,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:16:42,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:42,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:42,724 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) [2022-01-18 04:16:42,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 04:16:42,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:16:42,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:42,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:42,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:42,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640447471] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:42,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:42,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 04:16:42,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5102255] [2022-01-18 04:16:42,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:42,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:42,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:42,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:42,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:42,839 INFO L87 Difference]: Start difference. First operand 110 states and 288 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:42,925 INFO L93 Difference]: Finished difference Result 156 states and 378 transitions. [2022-01-18 04:16:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:16:42,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:42,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:42,926 INFO L225 Difference]: With dead ends: 156 [2022-01-18 04:16:42,926 INFO L226 Difference]: Without dead ends: 153 [2022-01-18 04:16:42,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:16:42,927 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:42,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 11 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-18 04:16:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2022-01-18 04:16:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.63302752293578) internal successors, (287), 109 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 287 transitions. [2022-01-18 04:16:42,929 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 287 transitions. Word has length 15 [2022-01-18 04:16:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:42,929 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 287 transitions. [2022-01-18 04:16:42,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 287 transitions. [2022-01-18 04:16:42,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:42,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:42,930 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:42,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:43,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 04:16:43,131 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1600970561, now seen corresponding path program 25 times [2022-01-18 04:16:43,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:43,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491966932] [2022-01-18 04:16:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:43,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:43,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:43,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491966932] [2022-01-18 04:16:43,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491966932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:43,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743609466] [2022-01-18 04:16:43,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:16:43,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:43,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:43,165 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) [2022-01-18 04:16:43,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 04:16:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:43,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:43,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:43,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:43,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743609466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:43,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:43,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 04:16:43,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632031749] [2022-01-18 04:16:43,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:43,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:43,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:43,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:43,290 INFO L87 Difference]: Start difference. First operand 110 states and 287 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:43,523 INFO L93 Difference]: Finished difference Result 256 states and 515 transitions. [2022-01-18 04:16:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 04:16:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:43,524 INFO L225 Difference]: With dead ends: 256 [2022-01-18 04:16:43,524 INFO L226 Difference]: Without dead ends: 256 [2022-01-18 04:16:43,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:16:43,525 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 139 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:43,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 45 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-18 04:16:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 123. [2022-01-18 04:16:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.6885245901639343) internal successors, (328), 122 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 328 transitions. [2022-01-18 04:16:43,528 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 328 transitions. Word has length 15 [2022-01-18 04:16:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:43,528 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 328 transitions. [2022-01-18 04:16:43,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 328 transitions. [2022-01-18 04:16:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:43,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:43,528 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:43,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:43,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 04:16:43,744 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:43,744 INFO L85 PathProgramCache]: Analyzing trace with hash 23218281, now seen corresponding path program 26 times [2022-01-18 04:16:43,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:43,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483036475] [2022-01-18 04:16:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:43,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:43,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:43,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483036475] [2022-01-18 04:16:43,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483036475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:43,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126138373] [2022-01-18 04:16:43,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:16:43,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:43,778 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) [2022-01-18 04:16:43,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 04:16:43,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:16:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:43,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:43,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:43,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:43,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126138373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:43,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:43,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:43,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823660082] [2022-01-18 04:16:43,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:43,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:43,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:43,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:43,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:43,901 INFO L87 Difference]: Start difference. First operand 123 states and 328 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:44,223 INFO L93 Difference]: Finished difference Result 311 states and 588 transitions. [2022-01-18 04:16:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:16:44,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:44,224 INFO L225 Difference]: With dead ends: 311 [2022-01-18 04:16:44,225 INFO L226 Difference]: Without dead ends: 305 [2022-01-18 04:16:44,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=495, Invalid=987, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:16:44,225 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 168 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:44,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 39 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-01-18 04:16:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 123. [2022-01-18 04:16:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.6311475409836067) internal successors, (321), 122 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 321 transitions. [2022-01-18 04:16:44,229 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 321 transitions. Word has length 15 [2022-01-18 04:16:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:44,229 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 321 transitions. [2022-01-18 04:16:44,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 321 transitions. [2022-01-18 04:16:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:44,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:44,229 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:44,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:44,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:44,445 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash 686306359, now seen corresponding path program 27 times [2022-01-18 04:16:44,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:44,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042204475] [2022-01-18 04:16:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:44,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:44,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:44,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042204475] [2022-01-18 04:16:44,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042204475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:44,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988160757] [2022-01-18 04:16:44,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:16:44,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:44,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:44,480 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) [2022-01-18 04:16:44,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 04:16:44,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:16:44,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:44,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:44,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:44,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:44,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988160757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:44,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:44,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:44,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111179285] [2022-01-18 04:16:44,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:44,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:44,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:44,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:44,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:44,597 INFO L87 Difference]: Start difference. First operand 123 states and 321 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:44,655 INFO L93 Difference]: Finished difference Result 199 states and 438 transitions. [2022-01-18 04:16:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 04:16:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:44,656 INFO L225 Difference]: With dead ends: 199 [2022-01-18 04:16:44,656 INFO L226 Difference]: Without dead ends: 199 [2022-01-18 04:16:44,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:44,657 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:44,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 43 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-18 04:16:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 128. [2022-01-18 04:16:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6692913385826773) internal successors, (339), 127 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 339 transitions. [2022-01-18 04:16:44,659 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 339 transitions. Word has length 15 [2022-01-18 04:16:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:44,659 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 339 transitions. [2022-01-18 04:16:44,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 339 transitions. [2022-01-18 04:16:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:44,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:44,660 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:44,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:44,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:44,861 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:44,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1595229769, now seen corresponding path program 28 times [2022-01-18 04:16:44,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:44,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323438476] [2022-01-18 04:16:44,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:44,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:44,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:44,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323438476] [2022-01-18 04:16:44,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323438476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:44,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456111865] [2022-01-18 04:16:44,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:16:44,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:44,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:44,894 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) [2022-01-18 04:16:44,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 04:16:44,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:16:44,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:44,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:44,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:44,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:45,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456111865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:45,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:45,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:45,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913304130] [2022-01-18 04:16:45,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:45,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:45,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:45,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:45,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:45,007 INFO L87 Difference]: Start difference. First operand 128 states and 339 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:45,102 INFO L93 Difference]: Finished difference Result 208 states and 448 transitions. [2022-01-18 04:16:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 04:16:45,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:45,103 INFO L225 Difference]: With dead ends: 208 [2022-01-18 04:16:45,103 INFO L226 Difference]: Without dead ends: 207 [2022-01-18 04:16:45,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:16:45,103 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:45,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 33 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-18 04:16:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 128. [2022-01-18 04:16:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6535433070866143) internal successors, (337), 127 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 337 transitions. [2022-01-18 04:16:45,106 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 337 transitions. Word has length 15 [2022-01-18 04:16:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:45,106 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 337 transitions. [2022-01-18 04:16:45,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 337 transitions. [2022-01-18 04:16:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:45,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:45,107 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:45,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:45,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:45,311 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:45,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1833653575, now seen corresponding path program 29 times [2022-01-18 04:16:45,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:45,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911564051] [2022-01-18 04:16:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:45,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:45,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:45,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911564051] [2022-01-18 04:16:45,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911564051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:45,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841978826] [2022-01-18 04:16:45,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:16:45,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:45,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:45,344 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) [2022-01-18 04:16:45,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 04:16:45,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:16:45,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:45,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:45,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:45,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:45,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841978826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:45,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:45,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:45,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863150446] [2022-01-18 04:16:45,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:45,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:45,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:45,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:45,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:45,470 INFO L87 Difference]: Start difference. First operand 128 states and 337 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:45,625 INFO L93 Difference]: Finished difference Result 284 states and 560 transitions. [2022-01-18 04:16:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 04:16:45,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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 15 [2022-01-18 04:16:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:45,626 INFO L225 Difference]: With dead ends: 284 [2022-01-18 04:16:45,626 INFO L226 Difference]: Without dead ends: 284 [2022-01-18 04:16:45,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=214, Invalid=338, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:16:45,626 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 146 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:45,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 49 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-18 04:16:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 127. [2022-01-18 04:16:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.642857142857143) internal successors, (333), 126 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 333 transitions. [2022-01-18 04:16:45,629 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 333 transitions. Word has length 15 [2022-01-18 04:16:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:45,630 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 333 transitions. [2022-01-18 04:16:45,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 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) [2022-01-18 04:16:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 333 transitions. [2022-01-18 04:16:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:45,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:45,630 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:45,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:45,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 04:16:45,843 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:45,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:45,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1844430873, now seen corresponding path program 30 times [2022-01-18 04:16:45,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:45,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882034553] [2022-01-18 04:16:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:45,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:45,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:45,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882034553] [2022-01-18 04:16:45,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882034553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:45,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944670322] [2022-01-18 04:16:45,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:16:45,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:45,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:45,876 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) [2022-01-18 04:16:45,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 04:16:45,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:16:45,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:45,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:45,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:45,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944670322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:45,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:45,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 04:16:45,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878085013] [2022-01-18 04:16:45,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:45,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:45,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:45,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:45,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:45,985 INFO L87 Difference]: Start difference. First operand 127 states and 333 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:46,103 INFO L93 Difference]: Finished difference Result 212 states and 449 transitions. [2022-01-18 04:16:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:16:46,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:46,105 INFO L225 Difference]: With dead ends: 212 [2022-01-18 04:16:46,105 INFO L226 Difference]: Without dead ends: 210 [2022-01-18 04:16:46,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:16:46,105 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 69 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:46,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 37 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-18 04:16:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 127. [2022-01-18 04:16:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.634920634920635) internal successors, (332), 126 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 332 transitions. [2022-01-18 04:16:46,108 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 332 transitions. Word has length 15 [2022-01-18 04:16:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:46,108 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 332 transitions. [2022-01-18 04:16:46,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 332 transitions. [2022-01-18 04:16:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:46,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:46,108 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:46,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 04:16:46,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:46,319 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:46,320 INFO L85 PathProgramCache]: Analyzing trace with hash -123040267, now seen corresponding path program 31 times [2022-01-18 04:16:46,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:46,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730444455] [2022-01-18 04:16:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:46,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:46,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:46,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730444455] [2022-01-18 04:16:46,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730444455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:46,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775426038] [2022-01-18 04:16:46,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:16:46,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:46,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:46,358 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) [2022-01-18 04:16:46,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 04:16:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:46,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:46,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:46,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775426038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:46,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:46,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 04:16:46,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746248360] [2022-01-18 04:16:46,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:46,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:46,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:46,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:46,461 INFO L87 Difference]: Start difference. First operand 127 states and 332 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:46,686 INFO L93 Difference]: Finished difference Result 299 states and 576 transitions. [2022-01-18 04:16:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 04:16:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:46,687 INFO L225 Difference]: With dead ends: 299 [2022-01-18 04:16:46,687 INFO L226 Difference]: Without dead ends: 299 [2022-01-18 04:16:46,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=555, Unknown=0, NotChecked=0, Total=870 [2022-01-18 04:16:46,688 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 162 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:46,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 65 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-18 04:16:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 127. [2022-01-18 04:16:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.634920634920635) internal successors, (332), 126 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 332 transitions. [2022-01-18 04:16:46,692 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 332 transitions. Word has length 15 [2022-01-18 04:16:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:46,692 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 332 transitions. [2022-01-18 04:16:46,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 332 transitions. [2022-01-18 04:16:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:46,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:46,692 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:46,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:46,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:46,903 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:46,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:46,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1099728375, now seen corresponding path program 32 times [2022-01-18 04:16:46,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:46,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475161198] [2022-01-18 04:16:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:46,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:46,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:46,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475161198] [2022-01-18 04:16:46,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475161198] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:46,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533293896] [2022-01-18 04:16:46,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:16:46,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:46,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:46,937 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) [2022-01-18 04:16:46,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 04:16:46,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:16:46,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:46,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:46,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:46,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:47,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533293896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:47,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:47,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 04:16:47,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729443006] [2022-01-18 04:16:47,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:47,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:47,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:47,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:47,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:47,038 INFO L87 Difference]: Start difference. First operand 127 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:47,129 INFO L93 Difference]: Finished difference Result 180 states and 425 transitions. [2022-01-18 04:16:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:16:47,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:47,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:47,130 INFO L225 Difference]: With dead ends: 180 [2022-01-18 04:16:47,130 INFO L226 Difference]: Without dead ends: 177 [2022-01-18 04:16:47,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-01-18 04:16:47,130 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:47,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 31 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-18 04:16:47,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 127. [2022-01-18 04:16:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.626984126984127) internal successors, (331), 126 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 331 transitions. [2022-01-18 04:16:47,133 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 331 transitions. Word has length 15 [2022-01-18 04:16:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:47,133 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 331 transitions. [2022-01-18 04:16:47,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 331 transitions. [2022-01-18 04:16:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:47,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:47,133 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:47,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 04:16:47,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 04:16:47,350 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1366364729, now seen corresponding path program 33 times [2022-01-18 04:16:47,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:47,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074946901] [2022-01-18 04:16:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:47,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:47,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:47,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074946901] [2022-01-18 04:16:47,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074946901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:47,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313826734] [2022-01-18 04:16:47,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:16:47,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:47,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:47,380 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) [2022-01-18 04:16:47,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 04:16:47,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 04:16:47,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:47,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:47,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:47,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313826734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:47,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:47,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 04:16:47,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871927686] [2022-01-18 04:16:47,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:47,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:47,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:47,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:47,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:47,494 INFO L87 Difference]: Start difference. First operand 127 states and 331 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:47,678 INFO L93 Difference]: Finished difference Result 223 states and 454 transitions. [2022-01-18 04:16:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:16:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:47,679 INFO L225 Difference]: With dead ends: 223 [2022-01-18 04:16:47,679 INFO L226 Difference]: Without dead ends: 223 [2022-01-18 04:16:47,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2022-01-18 04:16:47,679 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 79 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:47,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 63 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:47,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-18 04:16:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 127. [2022-01-18 04:16:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.626984126984127) internal successors, (331), 126 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 331 transitions. [2022-01-18 04:16:47,682 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 331 transitions. Word has length 15 [2022-01-18 04:16:47,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:47,682 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 331 transitions. [2022-01-18 04:16:47,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 331 transitions. [2022-01-18 04:16:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:47,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:47,682 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:47,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:47,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 04:16:47,895 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash 511212583, now seen corresponding path program 34 times [2022-01-18 04:16:47,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:47,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21061636] [2022-01-18 04:16:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:47,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:47,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:47,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21061636] [2022-01-18 04:16:47,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21061636] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:47,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61693639] [2022-01-18 04:16:47,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:16:47,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:47,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:47,930 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) [2022-01-18 04:16:47,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 04:16:47,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:16:47,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:47,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:47,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:47,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:48,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61693639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:48,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:48,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 04:16:48,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473775555] [2022-01-18 04:16:48,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:48,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:16:48,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:48,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:16:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:16:48,020 INFO L87 Difference]: Start difference. First operand 127 states and 331 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:48,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:48,096 INFO L93 Difference]: Finished difference Result 169 states and 412 transitions. [2022-01-18 04:16:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:16:48,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:48,097 INFO L225 Difference]: With dead ends: 169 [2022-01-18 04:16:48,097 INFO L226 Difference]: Without dead ends: 165 [2022-01-18 04:16:48,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:16:48,098 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:48,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 15 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-18 04:16:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 127. [2022-01-18 04:16:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.619047619047619) internal successors, (330), 126 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 330 transitions. [2022-01-18 04:16:48,100 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 330 transitions. Word has length 15 [2022-01-18 04:16:48,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:48,100 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 330 transitions. [2022-01-18 04:16:48,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 330 transitions. [2022-01-18 04:16:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:48,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:48,100 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:48,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 04:16:48,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 04:16:48,307 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash 293279349, now seen corresponding path program 35 times [2022-01-18 04:16:48,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:48,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52819651] [2022-01-18 04:16:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:48,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:48,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52819651] [2022-01-18 04:16:48,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52819651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107722342] [2022-01-18 04:16:48,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:16:48,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:48,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:48,339 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) [2022-01-18 04:16:48,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 04:16:48,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 04:16:48,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:48,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:48,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:48,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107722342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:48,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:48,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 04:16:48,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530578908] [2022-01-18 04:16:48,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:48,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:16:48,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:48,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:16:48,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:16:48,428 INFO L87 Difference]: Start difference. First operand 127 states and 330 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:48,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:48,609 INFO L93 Difference]: Finished difference Result 215 states and 468 transitions. [2022-01-18 04:16:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:16:48,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:48,610 INFO L225 Difference]: With dead ends: 215 [2022-01-18 04:16:48,610 INFO L226 Difference]: Without dead ends: 215 [2022-01-18 04:16:48,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:16:48,610 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:48,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 39 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:48,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-18 04:16:48,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 133. [2022-01-18 04:16:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.643939393939394) internal successors, (349), 132 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:48,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 349 transitions. [2022-01-18 04:16:48,613 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 349 transitions. Word has length 15 [2022-01-18 04:16:48,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:48,613 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 349 transitions. [2022-01-18 04:16:48,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:48,613 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 349 transitions. [2022-01-18 04:16:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:48,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:48,613 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:48,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:48,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 04:16:48,828 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1340372081, now seen corresponding path program 36 times [2022-01-18 04:16:48,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:48,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36378741] [2022-01-18 04:16:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:48,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:48,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:48,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36378741] [2022-01-18 04:16:48,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36378741] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:48,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909908286] [2022-01-18 04:16:48,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:16:48,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:48,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:48,860 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) [2022-01-18 04:16:48,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 04:16:48,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:16:48,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:48,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:48,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:48,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:49,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909908286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:49,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:49,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:49,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204205988] [2022-01-18 04:16:49,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:49,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:49,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:49,000 INFO L87 Difference]: Start difference. First operand 133 states and 349 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:49,338 INFO L93 Difference]: Finished difference Result 310 states and 618 transitions. [2022-01-18 04:16:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 04:16:49,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:49,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:49,339 INFO L225 Difference]: With dead ends: 310 [2022-01-18 04:16:49,340 INFO L226 Difference]: Without dead ends: 306 [2022-01-18 04:16:49,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=488, Invalid=994, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 04:16:49,340 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 116 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:49,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 59 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-01-18 04:16:49,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 139. [2022-01-18 04:16:49,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.6884057971014492) internal successors, (371), 138 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:49,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 371 transitions. [2022-01-18 04:16:49,346 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 371 transitions. Word has length 15 [2022-01-18 04:16:49,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:49,346 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 371 transitions. [2022-01-18 04:16:49,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 371 transitions. [2022-01-18 04:16:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:49,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:49,347 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:49,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:49,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 04:16:49,547 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2003460159, now seen corresponding path program 37 times [2022-01-18 04:16:49,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:49,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924124143] [2022-01-18 04:16:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:49,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:49,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:49,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924124143] [2022-01-18 04:16:49,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924124143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:49,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536160002] [2022-01-18 04:16:49,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:16:49,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:49,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:49,591 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) [2022-01-18 04:16:49,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 04:16:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:49,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:49,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:49,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:49,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536160002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:49,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:49,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:49,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722931788] [2022-01-18 04:16:49,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:49,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:49,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:49,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:49,704 INFO L87 Difference]: Start difference. First operand 139 states and 371 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:49,770 INFO L93 Difference]: Finished difference Result 231 states and 519 transitions. [2022-01-18 04:16:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 04:16:49,770 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:49,771 INFO L225 Difference]: With dead ends: 231 [2022-01-18 04:16:49,771 INFO L226 Difference]: Without dead ends: 231 [2022-01-18 04:16:49,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:49,771 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 67 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:49,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 45 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-18 04:16:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 145. [2022-01-18 04:16:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.736111111111111) internal successors, (394), 144 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:49,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 394 transitions. [2022-01-18 04:16:49,774 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 394 transitions. Word has length 15 [2022-01-18 04:16:49,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:49,774 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 394 transitions. [2022-01-18 04:16:49,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 394 transitions. [2022-01-18 04:16:49,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:49,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:49,775 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:49,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:49,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 04:16:49,979 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1382583727, now seen corresponding path program 38 times [2022-01-18 04:16:49,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:49,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615197360] [2022-01-18 04:16:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:49,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:50,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:50,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615197360] [2022-01-18 04:16:50,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615197360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:50,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592983761] [2022-01-18 04:16:50,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:16:50,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:50,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:50,013 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) [2022-01-18 04:16:50,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 04:16:50,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:16:50,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:50,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:50,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:50,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592983761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:50,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:50,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:50,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154247035] [2022-01-18 04:16:50,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:50,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:50,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:50,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:50,115 INFO L87 Difference]: Start difference. First operand 145 states and 394 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:50,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:50,206 INFO L93 Difference]: Finished difference Result 230 states and 512 transitions. [2022-01-18 04:16:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 04:16:50,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:50,207 INFO L225 Difference]: With dead ends: 230 [2022-01-18 04:16:50,207 INFO L226 Difference]: Without dead ends: 229 [2022-01-18 04:16:50,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:16:50,208 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 105 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:50,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 29 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-18 04:16:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 145. [2022-01-18 04:16:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.7291666666666665) internal successors, (393), 144 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 393 transitions. [2022-01-18 04:16:50,211 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 393 transitions. Word has length 15 [2022-01-18 04:16:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:50,211 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 393 transitions. [2022-01-18 04:16:50,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 393 transitions. [2022-01-18 04:16:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:50,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:50,211 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:50,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 04:16:50,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 04:16:50,423 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash -516499775, now seen corresponding path program 39 times [2022-01-18 04:16:50,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:50,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580237819] [2022-01-18 04:16:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:50,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:50,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:50,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580237819] [2022-01-18 04:16:50,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580237819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:50,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456609921] [2022-01-18 04:16:50,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:16:50,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:50,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:50,456 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) [2022-01-18 04:16:50,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 04:16:50,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:16:50,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:50,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:50,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 04:16:50,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456609921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:50,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:50,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-18 04:16:50,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370791529] [2022-01-18 04:16:50,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:50,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:50,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:50,571 INFO L87 Difference]: Start difference. First operand 145 states and 393 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:50,717 INFO L93 Difference]: Finished difference Result 288 states and 597 transitions. [2022-01-18 04:16:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 04:16:50,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:50,718 INFO L225 Difference]: With dead ends: 288 [2022-01-18 04:16:50,718 INFO L226 Difference]: Without dead ends: 287 [2022-01-18 04:16:50,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=221, Invalid=379, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:16:50,719 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 214 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:50,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 29 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-18 04:16:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 146. [2022-01-18 04:16:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.6551724137931036) internal successors, (385), 145 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 385 transitions. [2022-01-18 04:16:50,722 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 385 transitions. Word has length 15 [2022-01-18 04:16:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:50,722 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 385 transitions. [2022-01-18 04:16:50,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 385 transitions. [2022-01-18 04:16:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:50,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:50,722 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:50,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:50,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 04:16:50,939 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:50,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:50,939 INFO L85 PathProgramCache]: Analyzing trace with hash -527277073, now seen corresponding path program 40 times [2022-01-18 04:16:50,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:50,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591469049] [2022-01-18 04:16:50,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:50,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:50,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:50,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591469049] [2022-01-18 04:16:50,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591469049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:50,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091292364] [2022-01-18 04:16:50,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:16:50,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:50,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:50,969 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) [2022-01-18 04:16:50,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 04:16:50,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:16:50,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:50,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:50,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:51,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:51,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091292364] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:51,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:51,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 04:16:51,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501610088] [2022-01-18 04:16:51,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:51,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:51,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:51,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:51,084 INFO L87 Difference]: Start difference. First operand 146 states and 385 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-01-18 04:16:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:51,187 INFO L93 Difference]: Finished difference Result 232 states and 503 transitions. [2022-01-18 04:16:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:16:51,187 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 15 [2022-01-18 04:16:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:51,188 INFO L225 Difference]: With dead ends: 232 [2022-01-18 04:16:51,188 INFO L226 Difference]: Without dead ends: 230 [2022-01-18 04:16:51,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:16:51,188 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:51,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 37 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-18 04:16:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 146. [2022-01-18 04:16:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.6482758620689655) internal successors, (384), 145 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 384 transitions. [2022-01-18 04:16:51,191 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 384 transitions. Word has length 15 [2022-01-18 04:16:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:51,191 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 384 transitions. [2022-01-18 04:16:51,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-01-18 04:16:51,191 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 384 transitions. [2022-01-18 04:16:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:51,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:51,192 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:51,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 04:16:51,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:51,392 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:51,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1194113533, now seen corresponding path program 41 times [2022-01-18 04:16:51,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:51,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362526615] [2022-01-18 04:16:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:51,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:51,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:51,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362526615] [2022-01-18 04:16:51,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362526615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:51,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005008062] [2022-01-18 04:16:51,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:16:51,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:51,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:51,428 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) [2022-01-18 04:16:51,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 04:16:51,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:16:51,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:51,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:51,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:51,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005008062] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:51,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:51,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 04:16:51,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384230702] [2022-01-18 04:16:51,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:51,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 04:16:51,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 04:16:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-18 04:16:51,557 INFO L87 Difference]: Start difference. First operand 146 states and 384 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-01-18 04:16:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:51,807 INFO L93 Difference]: Finished difference Result 308 states and 614 transitions. [2022-01-18 04:16:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 04:16:51,807 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 15 [2022-01-18 04:16:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:51,808 INFO L225 Difference]: With dead ends: 308 [2022-01-18 04:16:51,808 INFO L226 Difference]: Without dead ends: 308 [2022-01-18 04:16:51,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=370, Invalid=686, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 04:16:51,809 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 127 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:51,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 75 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-18 04:16:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 144. [2022-01-18 04:16:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.6363636363636362) internal successors, (377), 143 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 377 transitions. [2022-01-18 04:16:51,812 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 377 transitions. Word has length 15 [2022-01-18 04:16:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:51,812 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 377 transitions. [2022-01-18 04:16:51,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2022-01-18 04:16:51,812 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 377 transitions. [2022-01-18 04:16:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:51,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:51,812 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:51,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:52,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:52,020 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:52,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:52,021 INFO L85 PathProgramCache]: Analyzing trace with hash 217425425, now seen corresponding path program 42 times [2022-01-18 04:16:52,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:52,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419466334] [2022-01-18 04:16:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:52,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:52,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:52,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419466334] [2022-01-18 04:16:52,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419466334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:52,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377206420] [2022-01-18 04:16:52,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:16:52,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:52,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:52,051 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) [2022-01-18 04:16:52,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 04:16:52,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 04:16:52,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:52,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:52,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:52,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:52,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377206420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:52,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:52,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 04:16:52,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407023612] [2022-01-18 04:16:52,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:52,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:52,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:52,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:52,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:52,141 INFO L87 Difference]: Start difference. First operand 144 states and 377 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-01-18 04:16:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:52,225 INFO L93 Difference]: Finished difference Result 199 states and 472 transitions. [2022-01-18 04:16:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 04:16:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:52,225 INFO L225 Difference]: With dead ends: 199 [2022-01-18 04:16:52,225 INFO L226 Difference]: Without dead ends: 196 [2022-01-18 04:16:52,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2022-01-18 04:16:52,228 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 76 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:52,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 15 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:52,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-18 04:16:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2022-01-18 04:16:52,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.629370629370629) internal successors, (376), 143 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 376 transitions. [2022-01-18 04:16:52,231 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 376 transitions. Word has length 15 [2022-01-18 04:16:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:52,231 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 376 transitions. [2022-01-18 04:16:52,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-01-18 04:16:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 376 transitions. [2022-01-18 04:16:52,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:52,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:52,231 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:52,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:52,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 04:16:52,446 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:52,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:52,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1611448767, now seen corresponding path program 43 times [2022-01-18 04:16:52,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:52,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622434404] [2022-01-18 04:16:52,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:52,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:52,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:52,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622434404] [2022-01-18 04:16:52,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622434404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:52,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949320556] [2022-01-18 04:16:52,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:16:52,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:52,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:52,480 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) [2022-01-18 04:16:52,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 04:16:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:52,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:52,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:52,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949320556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:52,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:52,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 04:16:52,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531792720] [2022-01-18 04:16:52,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:52,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 04:16:52,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:52,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 04:16:52,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-18 04:16:52,599 INFO L87 Difference]: Start difference. First operand 144 states and 376 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-01-18 04:16:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:52,837 INFO L93 Difference]: Finished difference Result 248 states and 529 transitions. [2022-01-18 04:16:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 04:16:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:52,838 INFO L225 Difference]: With dead ends: 248 [2022-01-18 04:16:52,838 INFO L226 Difference]: Without dead ends: 248 [2022-01-18 04:16:52,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=682, Unknown=0, NotChecked=0, Total=992 [2022-01-18 04:16:52,839 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:52,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 57 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:52,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-18 04:16:52,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 148. [2022-01-18 04:16:52,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.6462585034013606) internal successors, (389), 147 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 389 transitions. [2022-01-18 04:16:52,841 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 389 transitions. Word has length 15 [2022-01-18 04:16:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:52,842 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 389 transitions. [2022-01-18 04:16:52,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2022-01-18 04:16:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 389 transitions. [2022-01-18 04:16:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:52,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:52,842 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:52,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 04:16:53,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 04:16:53,051 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:53,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1828366383, now seen corresponding path program 44 times [2022-01-18 04:16:53,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:53,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657328760] [2022-01-18 04:16:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:53,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:53,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:53,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657328760] [2022-01-18 04:16:53,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657328760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:53,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336161200] [2022-01-18 04:16:53,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 04:16:53,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:53,081 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) [2022-01-18 04:16:53,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 04:16:53,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 04:16:53,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:53,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:53,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:53,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:53,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336161200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:53,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:53,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 04:16:53,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371302725] [2022-01-18 04:16:53,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:53,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:16:53,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:53,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:16:53,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:16:53,163 INFO L87 Difference]: Start difference. First operand 148 states and 389 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:53,244 INFO L93 Difference]: Finished difference Result 202 states and 482 transitions. [2022-01-18 04:16:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 04:16:53,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:53,244 INFO L225 Difference]: With dead ends: 202 [2022-01-18 04:16:53,245 INFO L226 Difference]: Without dead ends: 198 [2022-01-18 04:16:53,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-01-18 04:16:53,245 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:53,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 25 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-18 04:16:53,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2022-01-18 04:16:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.639455782312925) internal successors, (388), 147 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 388 transitions. [2022-01-18 04:16:53,247 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 388 transitions. Word has length 15 [2022-01-18 04:16:53,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:53,247 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 388 transitions. [2022-01-18 04:16:53,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 388 transitions. [2022-01-18 04:16:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:53,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:53,248 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:53,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 04:16:53,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 04:16:53,448 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:53,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1610433149, now seen corresponding path program 45 times [2022-01-18 04:16:53,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:53,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762239836] [2022-01-18 04:16:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:53,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:53,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:53,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762239836] [2022-01-18 04:16:53,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762239836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:53,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478537814] [2022-01-18 04:16:53,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 04:16:53,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:53,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:53,487 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) [2022-01-18 04:16:53,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 04:16:53,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:53,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:53,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 04:16:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:53,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:53,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478537814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:53,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:53,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 04:16:53,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519140388] [2022-01-18 04:16:53,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:53,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 04:16:53,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:53,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 04:16:53,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-18 04:16:53,577 INFO L87 Difference]: Start difference. First operand 148 states and 388 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:53,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:53,760 INFO L93 Difference]: Finished difference Result 222 states and 508 transitions. [2022-01-18 04:16:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 04:16:53,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:53,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:53,761 INFO L225 Difference]: With dead ends: 222 [2022-01-18 04:16:53,761 INFO L226 Difference]: Without dead ends: 222 [2022-01-18 04:16:53,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=572, Unknown=0, NotChecked=0, Total=812 [2022-01-18 04:16:53,762 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:53,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 23 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:53,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-18 04:16:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 154. [2022-01-18 04:16:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.65359477124183) internal successors, (406), 153 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 406 transitions. [2022-01-18 04:16:53,764 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 406 transitions. Word has length 15 [2022-01-18 04:16:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:53,765 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 406 transitions. [2022-01-18 04:16:53,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 406 transitions. [2022-01-18 04:16:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:53,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:53,765 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:53,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 04:16:53,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:53,981 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash 227928529, now seen corresponding path program 46 times [2022-01-18 04:16:53,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:53,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448787361] [2022-01-18 04:16:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:53,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:54,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:54,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448787361] [2022-01-18 04:16:54,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448787361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:54,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488396353] [2022-01-18 04:16:54,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 04:16:54,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:54,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:54,016 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) [2022-01-18 04:16:54,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 04:16:54,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 04:16:54,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:54,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:54,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:54,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:54,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488396353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:54,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:54,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 04:16:54,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099368766] [2022-01-18 04:16:54,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:54,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 04:16:54,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 04:16:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:16:54,100 INFO L87 Difference]: Start difference. First operand 154 states and 406 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:54,171 INFO L93 Difference]: Finished difference Result 196 states and 486 transitions. [2022-01-18 04:16:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 04:16:54,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:54,172 INFO L225 Difference]: With dead ends: 196 [2022-01-18 04:16:54,172 INFO L226 Difference]: Without dead ends: 191 [2022-01-18 04:16:54,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2022-01-18 04:16:54,173 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:54,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 11 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 04:16:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-18 04:16:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 153. [2022-01-18 04:16:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.6578947368421053) internal successors, (404), 152 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 404 transitions. [2022-01-18 04:16:54,175 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 404 transitions. Word has length 15 [2022-01-18 04:16:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:54,175 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 404 transitions. [2022-01-18 04:16:54,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 404 transitions. [2022-01-18 04:16:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 04:16:54,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:54,176 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:54,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:54,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 04:16:54,376 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:54,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1590442559, now seen corresponding path program 47 times [2022-01-18 04:16:54,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:54,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018081745] [2022-01-18 04:16:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:54,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:54,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018081745] [2022-01-18 04:16:54,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018081745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149168164] [2022-01-18 04:16:54,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 04:16:54,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:54,411 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) [2022-01-18 04:16:54,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 04:16:54,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 04:16:54,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:54,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 04:16:54,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:54,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:54,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149168164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:54,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:54,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 04:16:54,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807592875] [2022-01-18 04:16:54,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:54,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 04:16:54,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:54,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 04:16:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-18 04:16:54,492 INFO L87 Difference]: Start difference. First operand 153 states and 404 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:54,615 INFO L93 Difference]: Finished difference Result 231 states and 552 transitions. [2022-01-18 04:16:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 04:16:54,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 04:16:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:54,616 INFO L225 Difference]: With dead ends: 231 [2022-01-18 04:16:54,616 INFO L226 Difference]: Without dead ends: 231 [2022-01-18 04:16:54,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2022-01-18 04:16:54,616 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:54,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 21 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-18 04:16:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 161. [2022-01-18 04:16:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.6625) internal successors, (426), 160 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 426 transitions. [2022-01-18 04:16:54,619 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 426 transitions. Word has length 15 [2022-01-18 04:16:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:54,619 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 426 transitions. [2022-01-18 04:16:54,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:54,619 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 426 transitions. [2022-01-18 04:16:54,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 04:16:54,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:54,620 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:54,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:54,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:54,835 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:54,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:54,835 INFO L85 PathProgramCache]: Analyzing trace with hash -949990882, now seen corresponding path program 48 times [2022-01-18 04:16:54,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:54,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995634407] [2022-01-18 04:16:54,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:54,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 04:16:54,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:54,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995634407] [2022-01-18 04:16:54,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995634407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:54,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851181490] [2022-01-18 04:16:54,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 04:16:54,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:54,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:54,907 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) [2022-01-18 04:16:54,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 04:16:54,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 04:16:54,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 04:16:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 04:16:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 04:16:54,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 04:16:55,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851181490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 04:16:55,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 04:16:55,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2022-01-18 04:16:55,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258599482] [2022-01-18 04:16:55,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 04:16:55,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 04:16:55,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 04:16:55,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 04:16:55,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 04:16:55,050 INFO L87 Difference]: Start difference. First operand 161 states and 426 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:55,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 04:16:55,212 INFO L93 Difference]: Finished difference Result 557 states and 1455 transitions. [2022-01-18 04:16:55,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 04:16:55,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 04:16:55,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 04:16:55,214 INFO L225 Difference]: With dead ends: 557 [2022-01-18 04:16:55,214 INFO L226 Difference]: Without dead ends: 552 [2022-01-18 04:16:55,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 04:16:55,215 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 113 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 04:16:55,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 23 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 04:16:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-18 04:16:55,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 317. [2022-01-18 04:16:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6297468354430378) internal successors, (831), 316 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 831 transitions. [2022-01-18 04:16:55,220 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 831 transitions. Word has length 16 [2022-01-18 04:16:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 04:16:55,220 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 831 transitions. [2022-01-18 04:16:55,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 04:16:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 831 transitions. [2022-01-18 04:16:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 04:16:55,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 04:16:55,221 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 04:16:55,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 04:16:55,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 04:16:55,428 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 04:16:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 04:16:55,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1859061101, now seen corresponding path program 49 times [2022-01-18 04:16:55,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 04:16:55,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606423958] [2022-01-18 04:16:55,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 04:16:55,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 04:16:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:55,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 04:16:55,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606423958] [2022-01-18 04:16:55,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606423958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 04:16:55,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457199116] [2022-01-18 04:16:55,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 04:16:55,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 04:16:55,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 04:16:55,480 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) [2022-01-18 04:16:55,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 04:16:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 04:16:55,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 04:16:55,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 04:16:55,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 04:16:55,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2022-01-18 04:16:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 04:16:56,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 04:16:58,024 INFO L353 Elim1Store]: treesize reduction 40, result has 95.8 percent of original size [2022-01-18 04:16:58,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 30 new quantified variables, introduced 120 case distinctions, treesize of input 35 treesize of output 980 Received shutdown request... [2022-01-18 04:30:17,006 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 04:30:17,008 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 04:30:17,014 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 [2022-01-18 04:30:17,015 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 04:30:17,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 04:30:17,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 04:30:17,209 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 21ms.. [2022-01-18 04:30:17,210 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 04:30:17,210 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 04:30:17,212 INFO L732 BasicCegarLoop]: Path program histogram: [49, 2, 1, 1] [2022-01-18 04:30:17,214 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 04:30:17,214 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 04:30:17,215 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:30:17 BasicIcfg [2022-01-18 04:30:17,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 04:30:17,216 INFO L158 Benchmark]: Toolchain (without parser) took 854727.15ms. Allocated memory was 436.2MB in the beginning and 1.7GB in the end (delta: 1.2GB). Free memory was 393.6MB in the beginning and 1.1GB in the end (delta: -680.7MB). Peak memory consumption was 1.0GB. Max. memory is 16.0GB. [2022-01-18 04:30:17,216 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 436.2MB. Free memory is still 394.7MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 04:30:17,216 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.45ms. Allocated memory is still 436.2MB. Free memory was 393.6MB in the beginning and 392.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 04:30:17,216 INFO L158 Benchmark]: Boogie Preprocessor took 10.32ms. Allocated memory is still 436.2MB. Free memory was 392.0MB in the beginning and 391.1MB in the end (delta: 976.6kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 04:30:17,216 INFO L158 Benchmark]: RCFGBuilder took 195.51ms. Allocated memory is still 436.2MB. Free memory was 391.1MB in the beginning and 380.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 04:30:17,217 INFO L158 Benchmark]: TraceAbstraction took 854491.90ms. Allocated memory was 436.2MB in the beginning and 1.7GB in the end (delta: 1.2GB). Free memory was 380.1MB in the beginning and 1.1GB in the end (delta: -694.3MB). Peak memory consumption was 1.0GB. Max. memory is 16.0GB. [2022-01-18 04:30:17,217 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 0.10ms. Allocated memory is still 436.2MB. Free memory is still 394.7MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.45ms. Allocated memory is still 436.2MB. Free memory was 393.6MB in the beginning and 392.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 10.32ms. Allocated memory is still 436.2MB. Free memory was 392.0MB in the beginning and 391.1MB in the end (delta: 976.6kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 195.51ms. Allocated memory is still 436.2MB. Free memory was 391.1MB in the beginning and 380.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 854491.90ms. Allocated memory was 436.2MB in the beginning and 1.7GB in the end (delta: 1.2GB). Free memory was 380.1MB in the beginning and 1.1GB in the end (delta: -694.3MB). Peak memory consumption was 1.0GB. Max. memory is 16.0GB. * 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: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 21ms.. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 21ms.. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 8,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 21ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 854.4s, OverallIterations: 53, TraceHistogramMax: 8, PathProgramHistogramMax: 49, EmptinessCheckTime: 0.0s, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4239 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4239 mSDsluCounter, 1890 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4533 mSDsCounter, 1200 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8090 IncrementalHoareTripleChecker+Invalid, 9290 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1200 mSolverCounterUnsat, 312 mSDtfsCounter, 8090 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2157 GetRequests, 1063 SyntacticMatches, 83 SemanticMatches, 1011 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6041 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=317occurred in iteration=52, InterpolantAutomatonStates: 887, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 52 MinimizatonAttempts, 4444 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 33.2s InterpolantComputationTime, 1469 NumberOfCodeBlocks, 1469 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 2039 ConstructedInterpolants, 0 QuantifiedInterpolants, 11173 SizeOfPredicates, 85 NumberOfNonLiveVariables, 2669 ConjunctsInSsa, 434 ConjunctsInUnsatCore, 150 InterpolantComputations, 3 PerfectInterpolantSequences, 776/1991 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