/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 17:29:34,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 17:29:34,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 17:29:34,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 17:29:34,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 17:29:34,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 17:29:34,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 17:29:34,570 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-Separate.epf [2022-01-18 17:29:34,586 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 17:29:34,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 17:29:34,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 17:29:34,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 17:29:34,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 17:29:34,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 17:29:34,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 17:29:34,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 17:29:34,588 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 17:29:34,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 17:29:34,589 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 17:29:34,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 17:29:34,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 17:29:34,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 17:29:34,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 17:29:34,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 17:29:34,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 17:29:34,590 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 17:29:34,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 17:29:34,590 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 17:29:34,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 17:29:34,590 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 17:29:34,590 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 17:29:34,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 17:29:34,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 17:29:34,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:29:34,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 17:29:34,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 17:29:34,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 17:29:34,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 17:29:34,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 17:29:34,592 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 17:29:34,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 17:29:34,592 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 17:29:34,592 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 17:29:34,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 17:29:34,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 17:29:34,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 17:29:34,793 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 17:29:34,794 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 17:29:34,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl [2022-01-18 17:29:34,795 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl' [2022-01-18 17:29:34,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 17:29:34,816 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 17:29:34,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 17:29:34,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 17:29:34,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 17:29:34,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:29:34" (1/1) ... [2022-01-18 17:29:34,844 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:29:34" (1/1) ... [2022-01-18 17:29:34,850 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 17:29:34,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 17:29:34,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 17:29:34,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 17:29:34,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 17:29:34,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:29:34" (1/1) ... [2022-01-18 17:29:34,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:29:34" (1/1) ... [2022-01-18 17:29:34,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:29:34" (1/1) ... [2022-01-18 17:29:34,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:29:34" (1/1) ... [2022-01-18 17:29:34,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:29:34" (1/1) ... [2022-01-18 17:29:34,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:29:34" (1/1) ... [2022-01-18 17:29:34,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:29:34" (1/1) ... [2022-01-18 17:29:34,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 17:29:34,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 17:29:34,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 17:29:34,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 17:29:34,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:29:34" (1/1) ... [2022-01-18 17:29:34,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:29:34,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:34,897 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 17:29:34,908 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 17:29:34,929 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 17:29:34,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 17:29:34,930 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 17:29:34,930 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 17:29:34,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 17:29:34,930 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 17:29:34,930 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 17:29:34,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 17:29:34,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 17:29:34,931 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 17:29:34,931 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 17:29:34,931 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 17:29:34,932 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 17:29:34,968 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 17:29:34,969 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 17:29:35,048 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 17:29:35,063 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 17:29:35,063 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 17:29:35,065 INFO L202 PluginConnector]: Adding new model mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:29:35 BoogieIcfgContainer [2022-01-18 17:29:35,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 17:29:35,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 17:29:35,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 17:29:35,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 17:29:35,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:29:34" (1/2) ... [2022-01-18 17:29:35,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@482e7eec and model type mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:29:35, skipping insertion in model container [2022-01-18 17:29:35,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:29:35" (2/2) ... [2022-01-18 17:29:35,082 INFO L111 eAbstractionObserver]: Analyzing ICFG mts.wvr.bpl [2022-01-18 17:29:35,088 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 17:29:35,088 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 17:29:35,088 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 17:29:35,089 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 17:29:35,124 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 17:29:35,160 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 17:29:35,165 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 17:29:35,166 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 17:29:35,173 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-01-18 17:29:35,227 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:35,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 17:29:35,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:35,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:35,238 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:35,249 INFO L85 PathProgramCache]: Analyzing trace with hash -427804195, now seen corresponding path program 1 times [2022-01-18 17:29:35,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:35,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556114866] [2022-01-18 17:29:35,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:35,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:35,438 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 17:29:35,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:35,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556114866] [2022-01-18 17:29:35,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556114866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:29:35,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:29:35,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:29:35,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544186546] [2022-01-18 17:29:35,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:29:35,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:29:35,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:35,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:29:35,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:29:35,486 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:35,609 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2022-01-18 17:29:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 17:29:35,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 17:29:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:35,622 INFO L225 Difference]: With dead ends: 154 [2022-01-18 17:29:35,622 INFO L226 Difference]: Without dead ends: 154 [2022-01-18 17:29:35,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:29:35,626 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:35,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:29:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-18 17:29:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2022-01-18 17:29:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states 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 17:29:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-01-18 17:29:35,712 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2022-01-18 17:29:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:35,713 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-01-18 17:29:35,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-01-18 17:29:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 17:29:35,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:35,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:35,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 17:29:35,716 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:35,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:35,717 INFO L85 PathProgramCache]: Analyzing trace with hash -436737251, now seen corresponding path program 1 times [2022-01-18 17:29:35,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:35,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424561935] [2022-01-18 17:29:35,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:35,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:29:35,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:35,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424561935] [2022-01-18 17:29:35,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424561935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:29:35,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:29:35,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:29:35,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238344107] [2022-01-18 17:29:35,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:29:35,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 17:29:35,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 17:29:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 17:29:35,781 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:35,841 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2022-01-18 17:29:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 17:29:35,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 17:29:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:35,845 INFO L225 Difference]: With dead ends: 158 [2022-01-18 17:29:35,845 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 17:29:35,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:29:35,846 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:35,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:29:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 17:29:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-01-18 17:29:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:35,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-01-18 17:29:35,864 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-01-18 17:29:35,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:35,865 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-01-18 17:29:35,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-01-18 17:29:35,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:29:35,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:35,867 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:35,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 17:29:35,867 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:35,868 INFO L85 PathProgramCache]: Analyzing trace with hash 277137723, now seen corresponding path program 1 times [2022-01-18 17:29:35,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:35,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919674847] [2022-01-18 17:29:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:35,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:36,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:36,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919674847] [2022-01-18 17:29:36,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919674847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:29:36,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247636244] [2022-01-18 17:29:36,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:36,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:36,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:36,383 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 17:29:36,390 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 17:29:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:36,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:29:36,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:29:37,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:29:37,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 40 [2022-01-18 17:29:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:37,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:29:37,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:29:37,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 95 [2022-01-18 17:29:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:38,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247636244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:29:38,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:29:38,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 19 [2022-01-18 17:29:38,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217178468] [2022-01-18 17:29:38,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:29:38,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:29:38,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:38,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:29:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:29:38,432 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:38,934 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-01-18 17:29:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 17:29:38,935 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:29:38,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:38,938 INFO L225 Difference]: With dead ends: 366 [2022-01-18 17:29:38,938 INFO L226 Difference]: Without dead ends: 351 [2022-01-18 17:29:38,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:29:38,939 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 198 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:38,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 84 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 309 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-01-18 17:29:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-18 17:29:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-01-18 17:29:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 17:29:38,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-01-18 17:29:38,957 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-01-18 17:29:38,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:38,957 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-01-18 17:29:38,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:38,957 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-01-18 17:29:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:29:38,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:38,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:38,981 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 17:29:39,179 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 17:29:39,180 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash 109328631, now seen corresponding path program 2 times [2022-01-18 17:29:39,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:39,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201678043] [2022-01-18 17:29:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:39,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:39,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201678043] [2022-01-18 17:29:39,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201678043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:29:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383387090] [2022-01-18 17:29:39,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:29:39,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:39,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:39,526 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 17:29:39,527 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 17:29:39,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:29:39,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:29:39,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:29:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:29:39,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:29:39,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 44 [2022-01-18 17:29:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:40,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:29:40,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:29:40,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 69 [2022-01-18 17:29:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:40,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383387090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:29:40,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:29:40,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 9] total 20 [2022-01-18 17:29:40,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672323131] [2022-01-18 17:29:40,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:29:40,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:29:40,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:40,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:29:40,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:29:40,831 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:41,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:41,811 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-01-18 17:29:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 17:29:41,812 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:29:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:41,815 INFO L225 Difference]: With dead ends: 478 [2022-01-18 17:29:41,815 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 17:29:41,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:29:41,816 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 230 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:41,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 126 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 590 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-01-18 17:29:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 17:29:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-01-18 17:29:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states 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 17:29:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-01-18 17:29:41,831 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-01-18 17:29:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:41,831 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-01-18 17:29:41,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:41,832 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-01-18 17:29:41,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:29:41,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:41,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:41,858 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 17:29:42,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-18 17:29:42,052 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:42,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash 408102079, now seen corresponding path program 3 times [2022-01-18 17:29:42,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:42,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11135499] [2022-01-18 17:29:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:42,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:42,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:42,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11135499] [2022-01-18 17:29:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11135499] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:29:42,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636357807] [2022-01-18 17:29:42,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:29:42,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:42,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:42,284 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 17:29:42,316 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 17:29:42,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:29:42,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:29:42,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:29:42,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:29:42,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 40 [2022-01-18 17:29:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:42,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:29:42,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:29:42,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 17:29:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:43,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636357807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:29:43,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:29:43,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-01-18 17:29:43,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196710423] [2022-01-18 17:29:43,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:29:43,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:29:43,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:29:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:29:43,416 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:44,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:44,061 INFO L93 Difference]: Finished difference Result 433 states and 1240 transitions. [2022-01-18 17:29:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 17:29:44,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:29:44,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:44,064 INFO L225 Difference]: With dead ends: 433 [2022-01-18 17:29:44,064 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 17:29:44,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:29:44,066 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 111 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:44,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 147 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 377 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-01-18 17:29:44,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 17:29:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 241. [2022-01-18 17:29:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states 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 17:29:44,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-01-18 17:29:44,076 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-01-18 17:29:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:44,077 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-01-18 17:29:44,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-01-18 17:29:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:29:44,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:44,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:44,105 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 17:29:44,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:44,299 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:44,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1978927679, now seen corresponding path program 4 times [2022-01-18 17:29:44,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:44,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146710441] [2022-01-18 17:29:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:44,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:44,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146710441] [2022-01-18 17:29:44,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146710441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:29:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710563036] [2022-01-18 17:29:44,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:29:44,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:44,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:44,520 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 17:29:44,520 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 17:29:44,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:29:44,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:29:44,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:29:44,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:29:44,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:29:44,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 46 [2022-01-18 17:29:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:45,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:29:45,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:29:45,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 17:29:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:45,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710563036] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:29:45,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:29:45,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 17:29:45,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654896838] [2022-01-18 17:29:45,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:29:45,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:29:45,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:45,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:29:45,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:29:45,608 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:45,985 INFO L93 Difference]: Finished difference Result 374 states and 1089 transitions. [2022-01-18 17:29:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:29:45,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:29:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:45,988 INFO L225 Difference]: With dead ends: 374 [2022-01-18 17:29:45,988 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 17:29:45,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:29:45,989 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:45,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 152 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 380 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 17:29:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 17:29:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 245. [2022-01-18 17:29:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9262295081967213) internal successors, (714), 244 states have internal predecessors, (714), 0 states have call successors, (0), 0 states 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 17:29:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 714 transitions. [2022-01-18 17:29:45,999 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 714 transitions. Word has length 22 [2022-01-18 17:29:45,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:45,999 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 714 transitions. [2022-01-18 17:29:46,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:46,000 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 714 transitions. [2022-01-18 17:29:46,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:29:46,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:46,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:46,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 17:29:46,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:46,215 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2069580027, now seen corresponding path program 5 times [2022-01-18 17:29:46,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091137380] [2022-01-18 17:29:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:46,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:46,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:46,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091137380] [2022-01-18 17:29:46,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091137380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:29:46,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491446213] [2022-01-18 17:29:46,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:29:46,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:46,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:46,436 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 17:29:46,438 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 17:29:46,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:29:46,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:29:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:29:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:29:46,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:29:46,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 62 [2022-01-18 17:29:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:47,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:29:47,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:29:47,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 17:29:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:47,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491446213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:29:47,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:29:47,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2022-01-18 17:29:47,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640736680] [2022-01-18 17:29:47,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:29:47,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:29:47,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:29:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:29:47,628 INFO L87 Difference]: Start difference. First operand 245 states and 714 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 17:29:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:48,916 INFO L93 Difference]: Finished difference Result 941 states and 2727 transitions. [2022-01-18 17:29:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 17:29:48,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) Word has length 22 [2022-01-18 17:29:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:48,920 INFO L225 Difference]: With dead ends: 941 [2022-01-18 17:29:48,920 INFO L226 Difference]: Without dead ends: 926 [2022-01-18 17:29:48,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:29:48,921 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:48,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 265 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 452 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2022-01-18 17:29:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-01-18 17:29:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 247. [2022-01-18 17:29:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states 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 17:29:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-01-18 17:29:48,931 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-01-18 17:29:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:48,932 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-01-18 17:29:48,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 17:29:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-01-18 17:29:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:29:48,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:48,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:48,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 17:29:49,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:49,146 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -809004765, now seen corresponding path program 6 times [2022-01-18 17:29:49,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:49,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785975652] [2022-01-18 17:29:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:49,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:49,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:49,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785975652] [2022-01-18 17:29:49,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785975652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:29:49,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925215896] [2022-01-18 17:29:49,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:29:49,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:49,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:49,360 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 17:29:49,390 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 17:29:49,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:29:49,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:29:49,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:29:49,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:29:49,646 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:29:49,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 57 [2022-01-18 17:29:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:49,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:29:50,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:29:50,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 17:29:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:50,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925215896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:29:50,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:29:50,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2022-01-18 17:29:50,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063032135] [2022-01-18 17:29:50,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:29:50,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:29:50,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:29:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:29:50,631 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 17:29:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:51,705 INFO L93 Difference]: Finished difference Result 697 states and 2001 transitions. [2022-01-18 17:29:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 17:29:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) Word has length 22 [2022-01-18 17:29:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:51,709 INFO L225 Difference]: With dead ends: 697 [2022-01-18 17:29:51,709 INFO L226 Difference]: Without dead ends: 682 [2022-01-18 17:29:51,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:29:51,710 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 134 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:51,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 211 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 348 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2022-01-18 17:29:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-18 17:29:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 247. [2022-01-18 17:29:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states 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 17:29:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-01-18 17:29:51,720 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-01-18 17:29:51,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:51,721 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-01-18 17:29:51,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 17:29:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-01-18 17:29:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:29:51,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:51,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:51,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-18 17:29:51,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:51,931 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1770731385, now seen corresponding path program 7 times [2022-01-18 17:29:51,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:51,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430868509] [2022-01-18 17:29:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:51,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:52,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430868509] [2022-01-18 17:29:52,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430868509] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:29:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143481757] [2022-01-18 17:29:52,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:29:52,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:52,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:52,168 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 17:29:52,169 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 17:29:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:52,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 17:29:52,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:29:52,532 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:29:52,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 55 [2022-01-18 17:29:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:52,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:29:52,952 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:29:52,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 17:29:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:53,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143481757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:29:53,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:29:53,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2022-01-18 17:29:53,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544716558] [2022-01-18 17:29:53,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:29:53,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:29:53,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:53,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:29:53,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:29:53,444 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:54,555 INFO L93 Difference]: Finished difference Result 713 states and 2059 transitions. [2022-01-18 17:29:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 17:29:54,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:29:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:54,559 INFO L225 Difference]: With dead ends: 713 [2022-01-18 17:29:54,559 INFO L226 Difference]: Without dead ends: 698 [2022-01-18 17:29:54,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:29:54,560 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:54,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 236 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 424 Invalid, 0 Unknown, 280 Unchecked, 0.3s Time] [2022-01-18 17:29:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-01-18 17:29:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 247. [2022-01-18 17:29:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states 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 17:29:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2022-01-18 17:29:54,571 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2022-01-18 17:29:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:54,571 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2022-01-18 17:29:54,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2022-01-18 17:29:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:29:54,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:54,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:54,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 17:29:54,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:54,796 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:54,796 INFO L85 PathProgramCache]: Analyzing trace with hash -973582823, now seen corresponding path program 8 times [2022-01-18 17:29:54,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:54,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763568426] [2022-01-18 17:29:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:54,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:54,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763568426] [2022-01-18 17:29:54,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763568426] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:29:54,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509457713] [2022-01-18 17:29:54,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:29:54,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:54,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:54,860 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 17:29:54,861 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 17:29:54,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:29:54,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:29:54,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:29:54,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:29:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:55,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:29:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:55,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509457713] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:29:55,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:29:55,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 17:29:55,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281096074] [2022-01-18 17:29:55,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:29:55,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:29:55,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:29:55,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:29:55,096 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:55,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:55,871 INFO L93 Difference]: Finished difference Result 1099 states and 3110 transitions. [2022-01-18 17:29:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:29:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:29:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:55,876 INFO L225 Difference]: With dead ends: 1099 [2022-01-18 17:29:55,876 INFO L226 Difference]: Without dead ends: 1099 [2022-01-18 17:29:55,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 17:29:55,878 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 267 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:55,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 206 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:29:55,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-01-18 17:29:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 311. [2022-01-18 17:29:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.141935483870968) internal successors, (974), 310 states have internal predecessors, (974), 0 states have call successors, (0), 0 states 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 17:29:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 974 transitions. [2022-01-18 17:29:55,893 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 974 transitions. Word has length 24 [2022-01-18 17:29:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:55,893 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 974 transitions. [2022-01-18 17:29:55,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:55,894 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 974 transitions. [2022-01-18 17:29:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:29:55,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:55,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:55,919 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 17:29:56,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 17:29:56,107 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:56,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1949901667, now seen corresponding path program 9 times [2022-01-18 17:29:56,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:56,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420705186] [2022-01-18 17:29:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:56,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:56,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:56,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420705186] [2022-01-18 17:29:56,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420705186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:29:56,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851379225] [2022-01-18 17:29:56,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:29:56,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:56,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:56,158 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 17:29:56,159 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 17:29:56,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:29:56,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:29:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:29:56,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:29:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:56,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:29:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:56,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851379225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:29:56,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:29:56,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:29:56,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042376663] [2022-01-18 17:29:56,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:29:56,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:29:56,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:29:56,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:29:56,409 INFO L87 Difference]: Start difference. First operand 311 states and 974 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:58,128 INFO L93 Difference]: Finished difference Result 1794 states and 5013 transitions. [2022-01-18 17:29:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 17:29:58,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:29:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:58,135 INFO L225 Difference]: With dead ends: 1794 [2022-01-18 17:29:58,135 INFO L226 Difference]: Without dead ends: 1794 [2022-01-18 17:29:58,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 17:29:58,138 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 411 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:58,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 333 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:29:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2022-01-18 17:29:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 315. [2022-01-18 17:29:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states 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 17:29:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-01-18 17:29:58,158 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-01-18 17:29:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:58,158 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-01-18 17:29:58,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-01-18 17:29:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:29:58,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:58,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:58,183 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 17:29:58,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:58,381 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:58,382 INFO L85 PathProgramCache]: Analyzing trace with hash -420997023, now seen corresponding path program 10 times [2022-01-18 17:29:58,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:58,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107728188] [2022-01-18 17:29:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:58,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:58,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:58,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107728188] [2022-01-18 17:29:58,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107728188] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:29:58,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89158501] [2022-01-18 17:29:58,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:29:58,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:58,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:58,429 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:29:58,429 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 17:29:58,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:29:58,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:29:58,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:29:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:29:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:58,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:29:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:29:58,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89158501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:29:58,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:29:58,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:29:58,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776144843] [2022-01-18 17:29:58,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:29:58,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:29:58,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:29:58,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:29:58,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:29:58,648 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:29:59,536 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-01-18 17:29:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:29:59,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:29:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:29:59,546 INFO L225 Difference]: With dead ends: 1470 [2022-01-18 17:29:59,546 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 17:29:59,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:29:59,548 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 388 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:29:59,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 257 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:29:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 17:29:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-01-18 17:29:59,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 17:29:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-01-18 17:29:59,564 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-01-18 17:29:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:29:59,564 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-01-18 17:29:59,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:29:59,564 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-01-18 17:29:59,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:29:59,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:29:59,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:29:59,590 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 17:29:59,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 17:29:59,787 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:29:59,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:29:59,788 INFO L85 PathProgramCache]: Analyzing trace with hash -446810915, now seen corresponding path program 1 times [2022-01-18 17:29:59,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:29:59,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918138583] [2022-01-18 17:29:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:59,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:29:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:29:59,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:29:59,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918138583] [2022-01-18 17:29:59,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918138583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:29:59,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795306485] [2022-01-18 17:29:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:29:59,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:29:59,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:29:59,819 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 17:29:59,820 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 17:29:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:29:59,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:29:59,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:29:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:29:59,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:00,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795306485] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:00,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:00,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 17:30:00,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054144137] [2022-01-18 17:30:00,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:00,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:30:00,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:00,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:30:00,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:30:00,021 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:00,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:00,165 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-01-18 17:30:00,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:30:00,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:00,168 INFO L225 Difference]: With dead ends: 685 [2022-01-18 17:30:00,168 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 17:30:00,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:30:00,169 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 146 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:00,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 40 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:30:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 17:30:00,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-01-18 17:30:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states 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 17:30:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-01-18 17:30:00,180 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-01-18 17:30:00,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:00,181 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-01-18 17:30:00,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-01-18 17:30:00,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:00,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:00,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:00,205 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 17:30:00,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 17:30:00,404 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:00,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:00,404 INFO L85 PathProgramCache]: Analyzing trace with hash -883779623, now seen corresponding path program 11 times [2022-01-18 17:30:00,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:00,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903424038] [2022-01-18 17:30:00,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:00,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:00,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:00,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903424038] [2022-01-18 17:30:00,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903424038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:00,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615017545] [2022-01-18 17:30:00,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:30:00,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:00,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:00,443 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 17:30:00,446 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 17:30:00,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:30:00,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:00,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:00,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:00,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:00,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615017545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:00,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:00,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 17:30:00,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210505911] [2022-01-18 17:30:00,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:00,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:30:00,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:30:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:30:00,619 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:00,916 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-01-18 17:30:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 17:30:00,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:00,922 INFO L225 Difference]: With dead ends: 1159 [2022-01-18 17:30:00,922 INFO L226 Difference]: Without dead ends: 1111 [2022-01-18 17:30:00,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:30:00,922 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 272 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:00,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 118 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:30:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-18 17:30:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-01-18 17:30:00,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states 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 17:30:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-01-18 17:30:00,939 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-01-18 17:30:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:00,940 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-01-18 17:30:00,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-01-18 17:30:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:00,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:00,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:00,966 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 17:30:01,163 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,SelfDestructingSolverStorable13 [2022-01-18 17:30:01,163 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:01,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:01,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1589736955, now seen corresponding path program 2 times [2022-01-18 17:30:01,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:01,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662055592] [2022-01-18 17:30:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:01,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:01,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:01,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:01,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662055592] [2022-01-18 17:30:01,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662055592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:01,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670686085] [2022-01-18 17:30:01,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:30:01,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:01,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:01,195 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 17:30:01,196 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 17:30:01,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:30:01,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:01,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:30:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:01,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:01,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670686085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:01,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:01,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 17:30:01,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872774884] [2022-01-18 17:30:01,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:01,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:30:01,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:01,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:30:01,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:30:01,353 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:01,532 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-01-18 17:30:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 17:30:01,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:01,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:01,537 INFO L225 Difference]: With dead ends: 1267 [2022-01-18 17:30:01,537 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 17:30:01,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:30:01,538 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 201 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:01,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 61 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:30:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 17:30:01,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-01-18 17:30:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states 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 17:30:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-01-18 17:30:01,557 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-01-18 17:30:01,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:01,557 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-01-18 17:30:01,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:01,557 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-01-18 17:30:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:01,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:01,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:01,585 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 17:30:01,776 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,SelfDestructingSolverStorable14 [2022-01-18 17:30:01,777 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1358548775, now seen corresponding path program 12 times [2022-01-18 17:30:01,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:01,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920921125] [2022-01-18 17:30:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:01,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:01,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920921125] [2022-01-18 17:30:01,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920921125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:01,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146082296] [2022-01-18 17:30:01,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:30:01,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:01,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:01,825 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 17:30:01,825 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 17:30:01,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:30:01,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:01,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:01,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:01,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:01,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146082296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:01,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:01,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:30:01,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695506394] [2022-01-18 17:30:01,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:01,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:30:01,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:30:01,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:30:01,981 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:02,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:02,456 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-01-18 17:30:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:30:02,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:02,464 INFO L225 Difference]: With dead ends: 2268 [2022-01-18 17:30:02,464 INFO L226 Difference]: Without dead ends: 2268 [2022-01-18 17:30:02,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:30:02,465 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 227 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:02,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 168 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:30:02,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-01-18 17:30:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-01-18 17:30:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states 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 17:30:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-01-18 17:30:02,491 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-01-18 17:30:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:02,491 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-01-18 17:30:02,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:02,492 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-01-18 17:30:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:02,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:02,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:02,516 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 17:30:02,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:02,716 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2143462869, now seen corresponding path program 13 times [2022-01-18 17:30:02,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:02,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446501271] [2022-01-18 17:30:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:02,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:02,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:02,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446501271] [2022-01-18 17:30:02,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446501271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:02,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469986303] [2022-01-18 17:30:02,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:30:02,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:02,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:02,778 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 17:30:02,779 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 17:30:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:02,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:02,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:02,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:02,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469986303] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:02,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:02,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:30:02,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926469554] [2022-01-18 17:30:02,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:02,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:30:02,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:30:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:30:02,961 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:03,560 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-01-18 17:30:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:30:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:03,569 INFO L225 Difference]: With dead ends: 2256 [2022-01-18 17:30:03,569 INFO L226 Difference]: Without dead ends: 2256 [2022-01-18 17:30:03,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:30:03,570 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 280 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:03,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 158 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:30:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-01-18 17:30:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-01-18 17:30:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states 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 17:30:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-01-18 17:30:03,598 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-01-18 17:30:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:03,599 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-01-18 17:30:03,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-01-18 17:30:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:03,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:03,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:03,627 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 17:30:03,815 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,SelfDestructingSolverStorable16 [2022-01-18 17:30:03,815 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:03,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1763448965, now seen corresponding path program 14 times [2022-01-18 17:30:03,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:03,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262873669] [2022-01-18 17:30:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:03,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:03,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:03,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262873669] [2022-01-18 17:30:03,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262873669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:03,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694622897] [2022-01-18 17:30:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:30:03,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:03,857 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 17:30:03,857 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 17:30:03,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:30:03,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:03,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:03,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:03,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:04,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694622897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:04,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:04,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-18 17:30:04,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535395964] [2022-01-18 17:30:04,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:04,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:30:04,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:04,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:30:04,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:30:04,038 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:04,327 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-01-18 17:30:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 17:30:04,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:04,332 INFO L225 Difference]: With dead ends: 1611 [2022-01-18 17:30:04,332 INFO L226 Difference]: Without dead ends: 1611 [2022-01-18 17:30:04,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:30:04,333 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 188 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:04,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 152 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:30:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-01-18 17:30:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-01-18 17:30:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states 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 17:30:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-01-18 17:30:04,357 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-01-18 17:30:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:04,357 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-01-18 17:30:04,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-01-18 17:30:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:04,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:04,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:04,384 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 17:30:04,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 17:30:04,581 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:04,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:04,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1205384683, now seen corresponding path program 15 times [2022-01-18 17:30:04,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:04,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076530072] [2022-01-18 17:30:04,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:04,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:04,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:04,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076530072] [2022-01-18 17:30:04,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076530072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:04,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989372270] [2022-01-18 17:30:04,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:30:04,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:04,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:04,625 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 17:30:04,643 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 17:30:04,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:30:04,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:04,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:04,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:04,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:04,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989372270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:04,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:04,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:30:04,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525305613] [2022-01-18 17:30:04,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:04,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:30:04,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:04,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:30:04,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:30:04,806 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:05,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:05,313 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-01-18 17:30:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:30:05,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:05,320 INFO L225 Difference]: With dead ends: 2408 [2022-01-18 17:30:05,321 INFO L226 Difference]: Without dead ends: 2404 [2022-01-18 17:30:05,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:30:05,322 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 264 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:05,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 165 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:30:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-01-18 17:30:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-01-18 17:30:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states 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 17:30:05,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-01-18 17:30:05,355 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-01-18 17:30:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:05,356 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-01-18 17:30:05,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-01-18 17:30:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:05,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:05,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:05,383 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 17:30:05,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:05,581 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:05,582 INFO L85 PathProgramCache]: Analyzing trace with hash 287738009, now seen corresponding path program 16 times [2022-01-18 17:30:05,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:05,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786949826] [2022-01-18 17:30:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:05,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:05,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:05,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786949826] [2022-01-18 17:30:05,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786949826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:05,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909677852] [2022-01-18 17:30:05,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:30:05,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:05,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:05,622 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 17:30:05,622 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 17:30:05,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:30:05,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:05,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:05,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:05,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:05,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909677852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:05,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:05,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:30:05,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623623252] [2022-01-18 17:30:05,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:05,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:30:05,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:05,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:30:05,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:30:05,829 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:06,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:06,772 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-01-18 17:30:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 17:30:06,772 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:06,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:06,782 INFO L225 Difference]: With dead ends: 3509 [2022-01-18 17:30:06,782 INFO L226 Difference]: Without dead ends: 3509 [2022-01-18 17:30:06,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:30:06,783 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 427 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:06,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 278 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:30:06,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-01-18 17:30:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-01-18 17:30:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states 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 17:30:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-01-18 17:30:06,827 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-01-18 17:30:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:06,827 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-01-18 17:30:06,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-01-18 17:30:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:06,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:06,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:06,855 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 17:30:07,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:07,046 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:07,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:07,046 INFO L85 PathProgramCache]: Analyzing trace with hash -767639385, now seen corresponding path program 17 times [2022-01-18 17:30:07,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:07,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096436868] [2022-01-18 17:30:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:07,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:07,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096436868] [2022-01-18 17:30:07,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096436868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862997805] [2022-01-18 17:30:07,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:30:07,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:07,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:07,096 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 17:30:07,096 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 17:30:07,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:30:07,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:07,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:07,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:07,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862997805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:07,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:07,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:30:07,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856763628] [2022-01-18 17:30:07,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:07,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:30:07,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:07,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:30:07,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:30:07,274 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:08,544 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-01-18 17:30:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 17:30:08,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:08,553 INFO L225 Difference]: With dead ends: 3211 [2022-01-18 17:30:08,553 INFO L226 Difference]: Without dead ends: 3207 [2022-01-18 17:30:08,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:30:08,555 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 421 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:08,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 288 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:30:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-01-18 17:30:08,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-01-18 17:30:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states 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 17:30:08,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-01-18 17:30:08,596 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-01-18 17:30:08,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:08,596 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-01-18 17:30:08,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:08,596 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-01-18 17:30:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:08,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:08,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:08,623 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 17:30:08,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:08,815 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:08,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1330941631, now seen corresponding path program 3 times [2022-01-18 17:30:08,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:08,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228814825] [2022-01-18 17:30:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:08,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:08,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:08,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228814825] [2022-01-18 17:30:08,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228814825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:08,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427930402] [2022-01-18 17:30:08,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:30:08,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:08,856 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 17:30:08,885 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 17:30:08,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:30:08,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:08,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:30:08,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:08,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:09,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427930402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:09,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:09,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 17:30:09,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407657760] [2022-01-18 17:30:09,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:09,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 17:30:09,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 17:30:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:30:09,018 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:09,137 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-01-18 17:30:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 17:30:09,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:09,140 INFO L225 Difference]: With dead ends: 1333 [2022-01-18 17:30:09,140 INFO L226 Difference]: Without dead ends: 1333 [2022-01-18 17:30:09,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:30:09,141 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:09,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 61 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:30:09,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-18 17:30:09,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-01-18 17:30:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states 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 17:30:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-01-18 17:30:09,162 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-01-18 17:30:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:09,162 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-01-18 17:30:09,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-01-18 17:30:09,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:09,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:09,165 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:09,187 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 17:30:09,386 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,SelfDestructingSolverStorable21 [2022-01-18 17:30:09,386 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:09,386 INFO L85 PathProgramCache]: Analyzing trace with hash -400741887, now seen corresponding path program 18 times [2022-01-18 17:30:09,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:09,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102302775] [2022-01-18 17:30:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:09,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:09,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102302775] [2022-01-18 17:30:09,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102302775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025024055] [2022-01-18 17:30:09,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:30:09,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:09,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:09,429 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 17:30:09,445 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 17:30:09,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:30:09,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:09,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:09,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:09,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025024055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:09,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:09,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 17:30:09,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703543655] [2022-01-18 17:30:09,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:09,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:30:09,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:30:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:30:09,568 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:09,923 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-01-18 17:30:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:30:09,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:09,929 INFO L225 Difference]: With dead ends: 2129 [2022-01-18 17:30:09,929 INFO L226 Difference]: Without dead ends: 2129 [2022-01-18 17:30:09,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:30:09,930 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:09,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 131 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:30:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-18 17:30:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-01-18 17:30:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states 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 17:30:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-01-18 17:30:09,960 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-01-18 17:30:09,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:09,961 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-01-18 17:30:09,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-01-18 17:30:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:09,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:09,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:09,991 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 17:30:10,179 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,SelfDestructingSolverStorable22 [2022-01-18 17:30:10,179 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:10,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:10,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1501937565, now seen corresponding path program 19 times [2022-01-18 17:30:10,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:10,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394376908] [2022-01-18 17:30:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:10,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:10,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:10,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394376908] [2022-01-18 17:30:10,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394376908] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:10,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858538343] [2022-01-18 17:30:10,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:30:10,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:10,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:10,217 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 17:30:10,217 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 17:30:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:10,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:10,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:10,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:10,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858538343] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:10,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:10,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 17:30:10,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610886945] [2022-01-18 17:30:10,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:10,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:30:10,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:10,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:30:10,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:30:10,348 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:10,678 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-01-18 17:30:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:30:10,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:10,684 INFO L225 Difference]: With dead ends: 2262 [2022-01-18 17:30:10,684 INFO L226 Difference]: Without dead ends: 2262 [2022-01-18 17:30:10,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:30:10,689 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 184 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:10,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 115 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:30:10,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-01-18 17:30:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-01-18 17:30:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states 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 17:30:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-01-18 17:30:10,723 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-01-18 17:30:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:10,723 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-01-18 17:30:10,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-01-18 17:30:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:10,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:10,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:10,750 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 17:30:10,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:10,939 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:10,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:10,940 INFO L85 PathProgramCache]: Analyzing trace with hash 418914909, now seen corresponding path program 20 times [2022-01-18 17:30:10,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:10,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764883514] [2022-01-18 17:30:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:10,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:10,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764883514] [2022-01-18 17:30:10,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764883514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846446181] [2022-01-18 17:30:10,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:30:10,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:10,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:10,978 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 17:30:10,979 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 17:30:11,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:30:11,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:11,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:11,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:11,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:11,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846446181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:11,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:11,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-18 17:30:11,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163609788] [2022-01-18 17:30:11,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:11,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:30:11,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:11,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:30:11,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:30:11,132 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 17:30:11,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:11,344 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-01-18 17:30:11,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 17:30:11,344 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:11,347 INFO L225 Difference]: With dead ends: 1474 [2022-01-18 17:30:11,347 INFO L226 Difference]: Without dead ends: 1464 [2022-01-18 17:30:11,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:30:11,348 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:11,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 90 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:30:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-01-18 17:30:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-01-18 17:30:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states 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 17:30:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-01-18 17:30:11,369 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-01-18 17:30:11,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:11,370 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-01-18 17:30:11,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 17:30:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-01-18 17:30:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:11,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:11,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:11,395 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 17:30:11,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:11,594 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:11,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1846909987, now seen corresponding path program 21 times [2022-01-18 17:30:11,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:11,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591631990] [2022-01-18 17:30:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:11,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:11,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591631990] [2022-01-18 17:30:11,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591631990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784532307] [2022-01-18 17:30:11,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:30:11,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:11,630 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 17:30:11,631 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 17:30:11,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:30:11,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:11,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:11,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:11,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:11,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784532307] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:11,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:11,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 17:30:11,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769873957] [2022-01-18 17:30:11,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:11,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:30:11,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:11,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:30:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:30:11,770 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:12,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:12,038 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-01-18 17:30:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:30:12,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:12,044 INFO L225 Difference]: With dead ends: 2318 [2022-01-18 17:30:12,044 INFO L226 Difference]: Without dead ends: 2314 [2022-01-18 17:30:12,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:30:12,045 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 220 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:12,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 99 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:30:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-18 17:30:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-01-18 17:30:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states 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 17:30:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-01-18 17:30:12,077 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-01-18 17:30:12,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:12,077 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-01-18 17:30:12,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-01-18 17:30:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:12,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:12,080 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:12,105 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 17:30:12,301 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,SelfDestructingSolverStorable25 [2022-01-18 17:30:12,302 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:12,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1526355169, now seen corresponding path program 22 times [2022-01-18 17:30:12,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:12,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792004771] [2022-01-18 17:30:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:12,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:12,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:12,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792004771] [2022-01-18 17:30:12,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792004771] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:12,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677769427] [2022-01-18 17:30:12,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:30:12,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:12,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:12,342 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 17:30:12,342 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 17:30:12,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:30:12,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:12,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:12,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:12,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:12,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677769427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:12,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:12,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 17:30:12,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448021778] [2022-01-18 17:30:12,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:12,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:30:12,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:12,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:30:12,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:30:12,473 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:12,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:12,779 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-01-18 17:30:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 17:30:12,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:12,788 INFO L225 Difference]: With dead ends: 2302 [2022-01-18 17:30:12,788 INFO L226 Difference]: Without dead ends: 2290 [2022-01-18 17:30:12,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:30:12,791 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:12,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 124 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:30:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-01-18 17:30:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-01-18 17:30:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states 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 17:30:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-01-18 17:30:12,823 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-01-18 17:30:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:12,823 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-01-18 17:30:12,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-01-18 17:30:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:12,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:12,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:12,852 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 17:30:13,035 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,SelfDestructingSolverStorable26 [2022-01-18 17:30:13,035 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:13,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1528032797, now seen corresponding path program 23 times [2022-01-18 17:30:13,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:13,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908287882] [2022-01-18 17:30:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:13,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:13,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:13,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908287882] [2022-01-18 17:30:13,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908287882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:13,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650845316] [2022-01-18 17:30:13,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:30:13,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:13,083 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 17:30:13,119 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 17:30:13,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:30:13,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:13,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:13,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:13,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:13,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650845316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:13,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:13,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:30:13,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712801227] [2022-01-18 17:30:13,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:13,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:30:13,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:13,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:30:13,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:30:13,315 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:14,214 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-01-18 17:30:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:30:14,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:14,223 INFO L225 Difference]: With dead ends: 4760 [2022-01-18 17:30:14,224 INFO L226 Difference]: Without dead ends: 4760 [2022-01-18 17:30:14,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:30:14,225 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 316 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:14,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 262 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:30:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-01-18 17:30:14,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-01-18 17:30:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states 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 17:30:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-01-18 17:30:14,285 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-01-18 17:30:14,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:14,286 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-01-18 17:30:14,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-01-18 17:30:14,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:14,289 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:14,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:14,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 17:30:14,503 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,SelfDestructingSolverStorable27 [2022-01-18 17:30:14,503 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1238029855, now seen corresponding path program 24 times [2022-01-18 17:30:14,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:14,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638025973] [2022-01-18 17:30:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:14,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:14,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:14,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638025973] [2022-01-18 17:30:14,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638025973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:14,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159294726] [2022-01-18 17:30:14,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:30:14,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:14,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:14,552 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 17:30:14,554 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 17:30:14,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:30:14,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:14,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:14,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:14,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:14,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159294726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:14,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:14,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:30:14,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984514106] [2022-01-18 17:30:14,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:14,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:30:14,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:14,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:30:14,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:30:14,760 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:15,455 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-01-18 17:30:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:30:15,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:15,462 INFO L225 Difference]: With dead ends: 4260 [2022-01-18 17:30:15,462 INFO L226 Difference]: Without dead ends: 4260 [2022-01-18 17:30:15,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 17:30:15,464 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 478 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:15,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 173 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:30:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-01-18 17:30:15,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-01-18 17:30:15,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states 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 17:30:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-01-18 17:30:15,507 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-01-18 17:30:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:15,507 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-01-18 17:30:15,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-01-18 17:30:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:15,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:15,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:15,533 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 17:30:15,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 17:30:15,730 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:15,731 INFO L85 PathProgramCache]: Analyzing trace with hash 922639019, now seen corresponding path program 25 times [2022-01-18 17:30:15,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:15,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653231554] [2022-01-18 17:30:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:15,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:15,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:15,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653231554] [2022-01-18 17:30:15,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653231554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:15,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320152556] [2022-01-18 17:30:15,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:30:15,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:15,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:15,769 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 17:30:15,770 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 17:30:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:15,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:15,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:15,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:15,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320152556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:15,931 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:15,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 17:30:15,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980485269] [2022-01-18 17:30:15,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:15,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:30:15,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:15,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:30:15,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:30:15,932 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:16,572 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-01-18 17:30:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:30:16,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:16,579 INFO L225 Difference]: With dead ends: 4602 [2022-01-18 17:30:16,579 INFO L226 Difference]: Without dead ends: 4602 [2022-01-18 17:30:16,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:30:16,580 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 344 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:16,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 199 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:30:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-01-18 17:30:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-01-18 17:30:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states 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 17:30:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-01-18 17:30:16,628 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-01-18 17:30:16,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:16,628 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-01-18 17:30:16,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-01-18 17:30:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:16,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:16,631 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:16,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 17:30:16,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:16,854 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1994955993, now seen corresponding path program 26 times [2022-01-18 17:30:16,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:16,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263477056] [2022-01-18 17:30:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:16,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:16,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:16,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263477056] [2022-01-18 17:30:16,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263477056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:16,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105806585] [2022-01-18 17:30:16,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:30:16,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:16,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:16,893 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 17:30:16,893 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 17:30:16,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:30:16,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:16,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:16,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:16,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:17,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105806585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:17,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:17,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 17:30:17,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617581598] [2022-01-18 17:30:17,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:17,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:30:17,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:17,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:30:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:30:17,054 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:17,609 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-01-18 17:30:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:30:17,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:17,616 INFO L225 Difference]: With dead ends: 4348 [2022-01-18 17:30:17,616 INFO L226 Difference]: Without dead ends: 4344 [2022-01-18 17:30:17,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:30:17,616 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 380 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:17,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 175 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:30:17,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-01-18 17:30:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-01-18 17:30:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states 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 17:30:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 17:30:17,670 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 17:30:17,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:17,670 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 17:30:17,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 17:30:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:17,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:17,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:17,688 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 17:30:17,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:17,873 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash -10861731, now seen corresponding path program 27 times [2022-01-18 17:30:17,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:17,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312837395] [2022-01-18 17:30:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:17,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:17,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:17,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312837395] [2022-01-18 17:30:17,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312837395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:17,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508973666] [2022-01-18 17:30:17,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:30:17,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:17,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:17,914 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 17:30:17,915 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 17:30:17,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:30:17,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:17,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:17,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:18,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:18,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508973666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:18,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:18,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:30:18,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047586601] [2022-01-18 17:30:18,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:18,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:30:18,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:18,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:30:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:30:18,098 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:18,692 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-01-18 17:30:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:30:18,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:18,700 INFO L225 Difference]: With dead ends: 4035 [2022-01-18 17:30:18,700 INFO L226 Difference]: Without dead ends: 4035 [2022-01-18 17:30:18,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 17:30:18,701 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 380 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:18,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 225 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:30:18,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-01-18 17:30:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-01-18 17:30:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states 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 17:30:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-01-18 17:30:18,735 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-01-18 17:30:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:18,735 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-01-18 17:30:18,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-01-18 17:30:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:18,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:18,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:18,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-18 17:30:18,938 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,SelfDestructingSolverStorable31 [2022-01-18 17:30:18,938 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:18,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:18,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1066239125, now seen corresponding path program 28 times [2022-01-18 17:30:18,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:18,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512898118] [2022-01-18 17:30:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:18,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:18,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:18,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512898118] [2022-01-18 17:30:18,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512898118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:18,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200153714] [2022-01-18 17:30:18,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:30:18,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:18,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:18,982 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 17:30:18,982 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 17:30:19,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:30:19,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:19,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:19,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:19,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:30:19,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200153714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:19,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:19,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:30:19,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169312333] [2022-01-18 17:30:19,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:19,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:30:19,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:19,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:30:19,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:30:19,165 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:19,898 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-01-18 17:30:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:30:19,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:19,905 INFO L225 Difference]: With dead ends: 3794 [2022-01-18 17:30:19,905 INFO L226 Difference]: Without dead ends: 3790 [2022-01-18 17:30:19,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 17:30:19,906 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 386 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:19,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 172 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:30:19,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-01-18 17:30:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-01-18 17:30:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states 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 17:30:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 17:30:19,956 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 17:30:19,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:19,956 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 17:30:19,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 17:30:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:19,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:19,958 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:19,973 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 17:30:20,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:20,159 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:20,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:20,159 INFO L85 PathProgramCache]: Analyzing trace with hash 286172165, now seen corresponding path program 29 times [2022-01-18 17:30:20,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:20,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422829897] [2022-01-18 17:30:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:20,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:20,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:20,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422829897] [2022-01-18 17:30:20,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422829897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:20,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93728007] [2022-01-18 17:30:20,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:30:20,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:20,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:20,201 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 17:30:20,202 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 17:30:20,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:30:20,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:20,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:20,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:20,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93728007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:20,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:20,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:30:20,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302496181] [2022-01-18 17:30:20,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:20,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:30:20,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:30:20,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:30:20,350 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:20,991 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-01-18 17:30:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:30:20,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:20,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:20,998 INFO L225 Difference]: With dead ends: 3978 [2022-01-18 17:30:20,998 INFO L226 Difference]: Without dead ends: 3978 [2022-01-18 17:30:20,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 17:30:20,999 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 214 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:20,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 186 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:30:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-01-18 17:30:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-01-18 17:30:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states 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 17:30:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-01-18 17:30:21,037 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-01-18 17:30:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:21,037 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-01-18 17:30:21,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-01-18 17:30:21,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:21,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:21,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:21,065 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 17:30:21,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:21,255 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1358489139, now seen corresponding path program 30 times [2022-01-18 17:30:21,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:21,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11878656] [2022-01-18 17:30:21,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:21,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:21,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:21,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11878656] [2022-01-18 17:30:21,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11878656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:21,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492642050] [2022-01-18 17:30:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:30:21,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:21,304 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 17:30:21,305 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 17:30:21,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:30:21,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:21,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:21,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:21,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:21,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492642050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:21,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:21,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:30:21,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462678384] [2022-01-18 17:30:21,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:21,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:30:21,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:21,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:30:21,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:30:21,482 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:21,986 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-01-18 17:30:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:30:21,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:21,992 INFO L225 Difference]: With dead ends: 3706 [2022-01-18 17:30:21,992 INFO L226 Difference]: Without dead ends: 3702 [2022-01-18 17:30:21,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:30:21,993 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 227 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:21,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 152 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:30:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-01-18 17:30:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-01-18 17:30:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states 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 17:30:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-01-18 17:30:22,028 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-01-18 17:30:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:22,028 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-01-18 17:30:22,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-01-18 17:30:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:22,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:22,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:22,046 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 17:30:22,231 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,SelfDestructingSolverStorable34 [2022-01-18 17:30:22,231 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:22,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:22,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1675641631, now seen corresponding path program 31 times [2022-01-18 17:30:22,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:22,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103962546] [2022-01-18 17:30:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:22,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:22,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:22,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103962546] [2022-01-18 17:30:22,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103962546] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:22,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586754204] [2022-01-18 17:30:22,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:30:22,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:22,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:22,277 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 17:30:22,277 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 17:30:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:22,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:22,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:22,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:22,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586754204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:22,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:22,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:30:22,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686070159] [2022-01-18 17:30:22,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:22,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:30:22,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:22,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:30:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:30:22,424 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:22,971 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-01-18 17:30:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:30:22,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:22,978 INFO L225 Difference]: With dead ends: 4114 [2022-01-18 17:30:22,978 INFO L226 Difference]: Without dead ends: 4102 [2022-01-18 17:30:22,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:30:22,979 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 333 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:22,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 169 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:30:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-01-18 17:30:23,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-01-18 17:30:23,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states 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 17:30:23,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-01-18 17:30:23,016 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-01-18 17:30:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:23,016 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-01-18 17:30:23,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-01-18 17:30:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:23,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:23,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:23,045 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 17:30:23,235 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,SelfDestructingSolverStorable35 [2022-01-18 17:30:23,235 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:23,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1003355295, now seen corresponding path program 32 times [2022-01-18 17:30:23,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:23,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876207016] [2022-01-18 17:30:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:23,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:23,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:23,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876207016] [2022-01-18 17:30:23,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876207016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:23,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115277509] [2022-01-18 17:30:23,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:30:23,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:23,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:23,279 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 17:30:23,281 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 17:30:23,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:30:23,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:23,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:23,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:23,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115277509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:23,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:23,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:30:23,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741101099] [2022-01-18 17:30:23,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:23,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:30:23,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:23,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:30:23,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:30:23,469 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:24,089 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-01-18 17:30:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:30:24,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:24,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:24,096 INFO L225 Difference]: With dead ends: 3694 [2022-01-18 17:30:24,096 INFO L226 Difference]: Without dead ends: 3694 [2022-01-18 17:30:24,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:30:24,096 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 349 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:24,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 269 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:30:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-01-18 17:30:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-01-18 17:30:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states 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 17:30:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-01-18 17:30:24,130 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-01-18 17:30:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:24,130 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-01-18 17:30:24,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-01-18 17:30:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:24,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:24,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:24,148 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 17:30:24,334 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,SelfDestructingSolverStorable36 [2022-01-18 17:30:24,334 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:24,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:24,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2058732689, now seen corresponding path program 33 times [2022-01-18 17:30:24,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:24,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778058870] [2022-01-18 17:30:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:24,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:24,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:24,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778058870] [2022-01-18 17:30:24,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778058870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:24,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843704997] [2022-01-18 17:30:24,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:30:24,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:24,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:24,380 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 17:30:24,381 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 17:30:24,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:30:24,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:24,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:24,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:24,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843704997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:24,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:24,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:30:24,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135026732] [2022-01-18 17:30:24,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:24,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:30:24,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:24,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:30:24,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:30:24,568 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:25,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:25,366 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-01-18 17:30:25,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:30:25,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:25,372 INFO L225 Difference]: With dead ends: 3420 [2022-01-18 17:30:25,372 INFO L226 Difference]: Without dead ends: 3416 [2022-01-18 17:30:25,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:30:25,372 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 355 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:25,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 205 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:30:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-01-18 17:30:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-01-18 17:30:25,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states 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 17:30:25,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-01-18 17:30:25,406 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-01-18 17:30:25,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:25,406 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-01-18 17:30:25,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:25,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-01-18 17:30:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:30:25,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:25,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:25,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 17:30:25,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:25,609 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash -575597751, now seen corresponding path program 34 times [2022-01-18 17:30:25,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:25,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551401656] [2022-01-18 17:30:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:25,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:25,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:25,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551401656] [2022-01-18 17:30:25,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551401656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:25,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899386953] [2022-01-18 17:30:25,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:30:25,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:25,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:25,662 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 17:30:25,686 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 17:30:25,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:30:25,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:25,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:30:25,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:25,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:25,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899386953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:30:25,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:30:25,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 17:30:25,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818335575] [2022-01-18 17:30:25,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:30:25,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:30:25,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:30:25,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:30:25,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:30:25,843 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:26,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:30:26,440 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-01-18 17:30:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:30:26,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:30:26,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:30:26,445 INFO L225 Difference]: With dead ends: 3256 [2022-01-18 17:30:26,445 INFO L226 Difference]: Without dead ends: 3244 [2022-01-18 17:30:26,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:30:26,446 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 242 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:30:26,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 197 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:30:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-01-18 17:30:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-01-18 17:30:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states 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 17:30:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-01-18 17:30:26,476 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-01-18 17:30:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:30:26,477 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-01-18 17:30:26,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:30:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-01-18 17:30:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:30:26,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:30:26,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:30:26,496 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 17:30:26,682 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,SelfDestructingSolverStorable38 [2022-01-18 17:30:26,682 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:30:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:30:26,683 INFO L85 PathProgramCache]: Analyzing trace with hash 201587259, now seen corresponding path program 4 times [2022-01-18 17:30:26,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:30:26,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208744859] [2022-01-18 17:30:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:30:26,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:30:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:30:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:27,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:30:27,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208744859] [2022-01-18 17:30:27,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208744859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:30:27,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606887977] [2022-01-18 17:30:27,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:30:27,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:30:27,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:30:27,404 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 17:30:27,405 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 17:30:27,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:30:27,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:30:27,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 17:30:27,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:30:28,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:30:28,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:30:28,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2022-01-18 17:30:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:30:28,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:30:29,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:30:29,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:30:29,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-01-18 17:31:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:16,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606887977] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:16,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:16,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:31:16,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093629383] [2022-01-18 17:31:16,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:16,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:31:16,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:16,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:31:16,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:31:16,350 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:22,981 INFO L93 Difference]: Finished difference Result 3711 states and 11925 transitions. [2022-01-18 17:31:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 17:31:22,983 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:22,990 INFO L225 Difference]: With dead ends: 3711 [2022-01-18 17:31:22,990 INFO L226 Difference]: Without dead ends: 3651 [2022-01-18 17:31:22,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=796, Invalid=3494, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:31:22,990 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 516 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:22,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 248 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1079 Invalid, 0 Unknown, 82 Unchecked, 0.9s Time] [2022-01-18 17:31:22,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2022-01-18 17:31:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 1749. [2022-01-18 17:31:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.5720823798627004) internal successors, (6244), 1748 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states 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 17:31:23,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6244 transitions. [2022-01-18 17:31:23,024 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6244 transitions. Word has length 26 [2022-01-18 17:31:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:23,024 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6244 transitions. [2022-01-18 17:31:23,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6244 transitions. [2022-01-18 17:31:23,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:23,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:23,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:23,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 17:31:23,227 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,SelfDestructingSolverStorable39 [2022-01-18 17:31:23,227 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1826810757, now seen corresponding path program 5 times [2022-01-18 17:31:23,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:23,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321392559] [2022-01-18 17:31:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:23,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:24,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:24,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321392559] [2022-01-18 17:31:24,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321392559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:24,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135995872] [2022-01-18 17:31:24,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:31:24,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:24,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:24,267 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 17:31:24,268 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 17:31:24,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:31:24,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 17:31:24,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:25,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:31:25,166 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-01-18 17:31:25,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 205 treesize of output 116 [2022-01-18 17:31:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:25,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:26,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:31:26,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:31:26,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-01-18 17:31:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:50,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135995872] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:50,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:50,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:31:50,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974249366] [2022-01-18 17:31:50,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:50,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:31:50,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:50,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:31:50,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:31:50,841 INFO L87 Difference]: Start difference. First operand 1749 states and 6244 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:57,831 INFO L93 Difference]: Finished difference Result 3933 states and 12668 transitions. [2022-01-18 17:31:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:31:57,832 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:57,839 INFO L225 Difference]: With dead ends: 3933 [2022-01-18 17:31:57,839 INFO L226 Difference]: Without dead ends: 3903 [2022-01-18 17:31:57,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=828, Invalid=3594, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:31:57,840 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 523 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:57,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 313 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1339 Invalid, 0 Unknown, 61 Unchecked, 1.0s Time] [2022-01-18 17:31:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2022-01-18 17:31:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 1825. [2022-01-18 17:31:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1824 states have (on average 3.5822368421052633) internal successors, (6534), 1824 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states 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 17:31:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 6534 transitions. [2022-01-18 17:31:57,876 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 6534 transitions. Word has length 26 [2022-01-18 17:31:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:57,876 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 6534 transitions. [2022-01-18 17:31:57,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 6534 transitions. [2022-01-18 17:31:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:57,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:57,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:57,895 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 17:31:58,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:58,080 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:58,080 INFO L85 PathProgramCache]: Analyzing trace with hash -235381449, now seen corresponding path program 35 times [2022-01-18 17:31:58,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:58,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581210602] [2022-01-18 17:31:58,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:58,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:58,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:58,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581210602] [2022-01-18 17:31:58,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581210602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:58,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455047102] [2022-01-18 17:31:58,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:31:58,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:58,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:58,779 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 17:31:58,780 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 17:31:58,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:31:58,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:58,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 17:31:58,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:59,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:31:59,612 INFO L353 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2022-01-18 17:31:59,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 367 treesize of output 163 [2022-01-18 17:31:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:59,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:00,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:32:00,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:32:00,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:32:00,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:00,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 359 treesize of output 243 [2022-01-18 17:32:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:02,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455047102] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:02,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:02,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 28 [2022-01-18 17:32:02,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126563956] [2022-01-18 17:32:02,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:02,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:32:02,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:02,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:32:02,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:32:02,359 INFO L87 Difference]: Start difference. First operand 1825 states and 6534 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:11,608 INFO L93 Difference]: Finished difference Result 3811 states and 12266 transitions. [2022-01-18 17:32:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 17:32:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:32:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:11,615 INFO L225 Difference]: With dead ends: 3811 [2022-01-18 17:32:11,615 INFO L226 Difference]: Without dead ends: 3766 [2022-01-18 17:32:11,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=860, Invalid=5782, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:32:11,616 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 442 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:11,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 485 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2109 Invalid, 0 Unknown, 195 Unchecked, 1.6s Time] [2022-01-18 17:32:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2022-01-18 17:32:11,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 2078. [2022-01-18 17:32:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 3.5185363505055367) internal successors, (7308), 2077 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states 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 17:32:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 7308 transitions. [2022-01-18 17:32:11,671 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 7308 transitions. Word has length 26 [2022-01-18 17:32:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:11,671 INFO L470 AbstractCegarLoop]: Abstraction has 2078 states and 7308 transitions. [2022-01-18 17:32:11,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 7308 transitions. [2022-01-18 17:32:11,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:32:11,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:11,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:11,698 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 17:32:11,891 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,SelfDestructingSolverStorable41 [2022-01-18 17:32:11,891 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash 569665727, now seen corresponding path program 6 times [2022-01-18 17:32:11,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:11,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753098519] [2022-01-18 17:32:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:11,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:12,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:12,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753098519] [2022-01-18 17:32:12,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753098519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:12,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260106505] [2022-01-18 17:32:12,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:32:12,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:12,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:12,679 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 17:32:12,680 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 17:32:12,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:32:12,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:12,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:32:12,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:13,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:32:13,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:32:13,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2022-01-18 17:32:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:13,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:14,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:32:14,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:14,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 247 [2022-01-18 17:32:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:53,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260106505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:53,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:53,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:32:53,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835918115] [2022-01-18 17:32:53,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:53,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:32:53,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:53,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:32:53,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:32:53,905 INFO L87 Difference]: Start difference. First operand 2078 states and 7308 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:59,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:59,982 INFO L93 Difference]: Finished difference Result 3852 states and 12395 transitions. [2022-01-18 17:32:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:32:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:32:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:59,993 INFO L225 Difference]: With dead ends: 3852 [2022-01-18 17:32:59,993 INFO L226 Difference]: Without dead ends: 3822 [2022-01-18 17:32:59,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=580, Invalid=2612, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 17:32:59,995 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 427 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:59,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 352 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1079 Invalid, 0 Unknown, 510 Unchecked, 0.8s Time] [2022-01-18 17:33:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2022-01-18 17:33:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 2123. [2022-01-18 17:33:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.5089538171536288) internal successors, (7446), 2122 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states 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 17:33:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7446 transitions. [2022-01-18 17:33:00,038 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7446 transitions. Word has length 26 [2022-01-18 17:33:00,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:00,038 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 7446 transitions. [2022-01-18 17:33:00,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7446 transitions. [2022-01-18 17:33:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:33:00,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:00,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:00,057 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 17:33:00,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:00,242 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash -941338781, now seen corresponding path program 7 times [2022-01-18 17:33:00,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:00,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324167671] [2022-01-18 17:33:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:00,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:00,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:00,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324167671] [2022-01-18 17:33:00,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324167671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:00,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802379778] [2022-01-18 17:33:00,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:33:00,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:00,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:00,902 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 17:33:00,903 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 17:33:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:00,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 17:33:00,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:01,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:33:01,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:33:01,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2022-01-18 17:33:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:01,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:02,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:33:02,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:02,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-01-18 17:33:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:23,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802379778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:23,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:23,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:33:23,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627034318] [2022-01-18 17:33:23,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:23,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:33:23,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:33:23,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:33:23,676 INFO L87 Difference]: Start difference. First operand 2123 states and 7446 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:29,389 INFO L93 Difference]: Finished difference Result 4333 states and 13845 transitions. [2022-01-18 17:33:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:33:29,389 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:33:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:29,397 INFO L225 Difference]: With dead ends: 4333 [2022-01-18 17:33:29,397 INFO L226 Difference]: Without dead ends: 4273 [2022-01-18 17:33:29,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=713, Invalid=3069, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:33:29,397 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 407 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:29,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 308 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:33:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2022-01-18 17:33:29,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 2151. [2022-01-18 17:33:29,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 3.5051162790697674) internal successors, (7536), 2150 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states 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 17:33:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 7536 transitions. [2022-01-18 17:33:29,451 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 7536 transitions. Word has length 26 [2022-01-18 17:33:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:29,451 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 7536 transitions. [2022-01-18 17:33:29,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 7536 transitions. [2022-01-18 17:33:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:33:29,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:29,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:29,478 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 17:33:29,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:29,671 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:29,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1325230499, now seen corresponding path program 8 times [2022-01-18 17:33:29,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:29,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546371020] [2022-01-18 17:33:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:29,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:30,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:30,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546371020] [2022-01-18 17:33:30,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546371020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:30,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83516269] [2022-01-18 17:33:30,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:33:30,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:30,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:30,560 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 17:33:30,561 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 17:33:30,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:33:30,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:30,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 17:33:30,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:31,232 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-18 17:33:31,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 245 treesize of output 136 [2022-01-18 17:33:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:32,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:33,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:33:33,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:33:33,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:33,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 295 treesize of output 237 [2022-01-18 17:34:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:04,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83516269] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:04,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:04,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 17:34:04,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620310961] [2022-01-18 17:34:04,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:04,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:34:04,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:04,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:34:04,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:34:04,939 INFO L87 Difference]: Start difference. First operand 2151 states and 7536 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:17,409 INFO L93 Difference]: Finished difference Result 4496 states and 14868 transitions. [2022-01-18 17:34:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 17:34:17,410 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:34:17,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:17,418 INFO L225 Difference]: With dead ends: 4496 [2022-01-18 17:34:17,418 INFO L226 Difference]: Without dead ends: 4466 [2022-01-18 17:34:17,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1282, Invalid=5858, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 17:34:17,419 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 486 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:17,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 604 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1485 Invalid, 0 Unknown, 931 Unchecked, 1.2s Time] [2022-01-18 17:34:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4466 states. [2022-01-18 17:34:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4466 to 2187. [2022-01-18 17:34:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 3.515096065873742) internal successors, (7684), 2186 states have internal predecessors, (7684), 0 states have call successors, (0), 0 states 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 17:34:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 7684 transitions. [2022-01-18 17:34:17,471 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 7684 transitions. Word has length 26 [2022-01-18 17:34:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:17,471 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 7684 transitions. [2022-01-18 17:34:17,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 7684 transitions. [2022-01-18 17:34:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:34:17,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:17,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:17,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 17:34:17,674 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,SelfDestructingSolverStorable44 [2022-01-18 17:34:17,675 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:17,675 INFO L85 PathProgramCache]: Analyzing trace with hash -612179209, now seen corresponding path program 9 times [2022-01-18 17:34:17,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:17,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246301944] [2022-01-18 17:34:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:17,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:18,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:18,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246301944] [2022-01-18 17:34:18,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246301944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:18,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793234777] [2022-01-18 17:34:18,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:34:18,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:18,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:18,568 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 17:34:18,568 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 17:34:18,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:34:18,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 17:34:18,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:19,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:34:19,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:34:19,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2022-01-18 17:34:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:19,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:20,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:34:20,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:20,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 295 treesize of output 245 [2022-01-18 17:34:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:35,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793234777] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:35,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:35,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 27 [2022-01-18 17:34:35,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012172896] [2022-01-18 17:34:35,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:35,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:34:35,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:35,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:34:35,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:34:35,811 INFO L87 Difference]: Start difference. First operand 2187 states and 7684 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:46,838 INFO L93 Difference]: Finished difference Result 5136 states and 16323 transitions. [2022-01-18 17:34:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 17:34:46,839 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:34:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:46,847 INFO L225 Difference]: With dead ends: 5136 [2022-01-18 17:34:46,847 INFO L226 Difference]: Without dead ends: 5076 [2022-01-18 17:34:46,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1120, Invalid=4886, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 17:34:46,848 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 619 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:46,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 417 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1725 Invalid, 0 Unknown, 1 Unchecked, 1.6s Time] [2022-01-18 17:34:46,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2022-01-18 17:34:46,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 2218. [2022-01-18 17:34:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 3.527740189445196) internal successors, (7821), 2217 states have internal predecessors, (7821), 0 states have call successors, (0), 0 states 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 17:34:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 7821 transitions. [2022-01-18 17:34:46,891 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 7821 transitions. Word has length 26 [2022-01-18 17:34:46,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:46,891 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 7821 transitions. [2022-01-18 17:34:46,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 7821 transitions. [2022-01-18 17:34:46,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:34:46,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:46,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:46,910 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 17:34:47,095 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,SelfDestructingSolverStorable45 [2022-01-18 17:34:47,095 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:47,096 INFO L85 PathProgramCache]: Analyzing trace with hash -779988301, now seen corresponding path program 10 times [2022-01-18 17:34:47,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:47,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477588987] [2022-01-18 17:34:47,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:47,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:47,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:47,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477588987] [2022-01-18 17:34:47,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477588987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:47,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980627001] [2022-01-18 17:34:47,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:34:47,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:47,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:47,683 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 17:34:47,685 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 17:34:47,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:34:47,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:47,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:47,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:48,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:34:48,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:34:48,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 84 [2022-01-18 17:34:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:48,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:49,604 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:34:49,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 295 treesize of output 245 [2022-01-18 17:34:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:58,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980627001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:58,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:58,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 24 [2022-01-18 17:34:58,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388627368] [2022-01-18 17:34:58,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:58,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:34:58,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:58,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:34:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:34:58,681 INFO L87 Difference]: Start difference. First operand 2218 states and 7821 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:00,893 INFO L93 Difference]: Finished difference Result 3323 states and 10969 transitions. [2022-01-18 17:35:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 17:35:00,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:35:00,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:00,900 INFO L225 Difference]: With dead ends: 3323 [2022-01-18 17:35:00,900 INFO L226 Difference]: Without dead ends: 3308 [2022-01-18 17:35:00,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:35:00,900 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 190 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:00,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 257 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1027 Invalid, 0 Unknown, 83 Unchecked, 0.8s Time] [2022-01-18 17:35:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2022-01-18 17:35:00,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 2224. [2022-01-18 17:35:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 3.5276653171390016) internal successors, (7842), 2223 states have internal predecessors, (7842), 0 states have call successors, (0), 0 states 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 17:35:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 7842 transitions. [2022-01-18 17:35:00,936 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 7842 transitions. Word has length 26 [2022-01-18 17:35:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:00,936 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 7842 transitions. [2022-01-18 17:35:00,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 7842 transitions. [2022-01-18 17:35:00,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:35:00,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:00,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:00,954 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 17:35:01,140 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,SelfDestructingSolverStorable46 [2022-01-18 17:35:01,140 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1447462967, now seen corresponding path program 11 times [2022-01-18 17:35:01,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:01,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536504080] [2022-01-18 17:35:01,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:01,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:01,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:01,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536504080] [2022-01-18 17:35:01,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536504080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:01,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204781166] [2022-01-18 17:35:01,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:35:01,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:01,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:01,865 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 17:35:01,866 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 17:35:01,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:35:01,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:01,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:35:01,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:02,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:35:02,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:02,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 96 [2022-01-18 17:35:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:02,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:03,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:35:03,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:03,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 319 treesize of output 263 [2022-01-18 17:36:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:00,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204781166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:00,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:00,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-01-18 17:36:00,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836129265] [2022-01-18 17:36:00,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:00,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:36:00,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:36:00,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:36:00,698 INFO L87 Difference]: Start difference. First operand 2224 states and 7842 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:28,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:29,095 INFO L93 Difference]: Finished difference Result 5709 states and 18272 transitions. [2022-01-18 17:36:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 17:36:29,096 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:36:29,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:29,106 INFO L225 Difference]: With dead ends: 5709 [2022-01-18 17:36:29,106 INFO L226 Difference]: Without dead ends: 5635 [2022-01-18 17:36:29,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=1923, Invalid=9207, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 17:36:29,107 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 695 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 2753 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 3217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:29,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 663 Invalid, 3217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2753 Invalid, 0 Unknown, 307 Unchecked, 2.5s Time] [2022-01-18 17:36:29,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2022-01-18 17:36:29,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 2294. [2022-01-18 17:36:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 3.554295682511993) internal successors, (8150), 2293 states have internal predecessors, (8150), 0 states have call successors, (0), 0 states 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 17:36:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 8150 transitions. [2022-01-18 17:36:29,163 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 8150 transitions. Word has length 26 [2022-01-18 17:36:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:29,163 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 8150 transitions. [2022-01-18 17:36:29,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 8150 transitions. [2022-01-18 17:36:29,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:36:29,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:29,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:29,182 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 17:36:29,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:29,367 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash 950741607, now seen corresponding path program 12 times [2022-01-18 17:36:29,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:29,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093724290] [2022-01-18 17:36:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:29,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:30,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093724290] [2022-01-18 17:36:30,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093724290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302040079] [2022-01-18 17:36:30,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:36:30,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:30,162 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 17:36:30,163 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 17:36:30,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:36:30,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:30,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:36:30,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:30,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:36:30,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:30,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 92 [2022-01-18 17:36:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:31,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:32,364 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 17:36:32,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 346 treesize of output 284 [2022-01-18 17:36:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:48,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302040079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:48,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:48,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 17:36:48,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984655470] [2022-01-18 17:36:48,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:48,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:36:48,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:48,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:36:48,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:36:48,593 INFO L87 Difference]: Start difference. First operand 2294 states and 8150 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:04,439 INFO L93 Difference]: Finished difference Result 4837 states and 15745 transitions. [2022-01-18 17:37:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 17:37:04,439 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:37:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:04,447 INFO L225 Difference]: With dead ends: 4837 [2022-01-18 17:37:04,448 INFO L226 Difference]: Without dead ends: 4807 [2022-01-18 17:37:04,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3139 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=1372, Invalid=8134, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 17:37:04,448 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 522 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:04,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 467 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 17:37:04,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2022-01-18 17:37:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 2302. [2022-01-18 17:37:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 2301 states have (on average 3.5567144719687094) internal successors, (8184), 2301 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states 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 17:37:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 8184 transitions. [2022-01-18 17:37:04,497 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 8184 transitions. Word has length 26 [2022-01-18 17:37:04,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:04,497 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 8184 transitions. [2022-01-18 17:37:04,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:04,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 8184 transitions. [2022-01-18 17:37:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:37:04,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:04,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:04,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 17:37:04,713 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,SelfDestructingSolverStorable48 [2022-01-18 17:37:04,713 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:37:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:04,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1845411963, now seen corresponding path program 13 times [2022-01-18 17:37:04,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:04,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651602478] [2022-01-18 17:37:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:04,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:05,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:05,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651602478] [2022-01-18 17:37:05,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651602478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:05,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541404319] [2022-01-18 17:37:05,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:37:05,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:05,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:05,372 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 17:37:05,373 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 17:37:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:05,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 17:37:05,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:06,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:06,216 INFO L353 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-01-18 17:37:06,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 240 treesize of output 135 [2022-01-18 17:37:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:06,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:07,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:37:07,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:07,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 319 treesize of output 263 [2022-01-18 17:37:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:45,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541404319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:45,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:45,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 17:37:45,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131674892] [2022-01-18 17:37:45,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:45,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:37:45,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:45,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:37:45,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:37:45,176 INFO L87 Difference]: Start difference. First operand 2302 states and 8184 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:59,748 INFO L93 Difference]: Finished difference Result 8575 states and 27772 transitions. [2022-01-18 17:37:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 17:37:59,749 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:37:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:59,763 INFO L225 Difference]: With dead ends: 8575 [2022-01-18 17:37:59,763 INFO L226 Difference]: Without dead ends: 8530 [2022-01-18 17:37:59,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2453 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=1324, Invalid=5648, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 17:37:59,764 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 567 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:59,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 465 Invalid, 2056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1388 Invalid, 0 Unknown, 583 Unchecked, 1.3s Time] [2022-01-18 17:37:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8530 states. [2022-01-18 17:37:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8530 to 2325. [2022-01-18 17:37:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 3.5654044750430294) internal successors, (8286), 2324 states have internal predecessors, (8286), 0 states have call successors, (0), 0 states 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 17:37:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 8286 transitions. [2022-01-18 17:37:59,828 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 8286 transitions. Word has length 26 [2022-01-18 17:37:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:59,828 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 8286 transitions. [2022-01-18 17:37:59,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 8286 transitions. [2022-01-18 17:37:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:37:59,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:59,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:59,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 17:38:00,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 17:38:00,033 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:38:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:00,033 INFO L85 PathProgramCache]: Analyzing trace with hash -899173769, now seen corresponding path program 36 times [2022-01-18 17:38:00,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:00,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707695900] [2022-01-18 17:38:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:00,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:00,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707695900] [2022-01-18 17:38:00,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707695900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984470213] [2022-01-18 17:38:00,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:38:00,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:00,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:00,567 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 17:38:00,567 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 17:38:00,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:38:00,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:00,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 17:38:00,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:01,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:01,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:01,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 118 [2022-01-18 17:38:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:02,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:04,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:38:04,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:04,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:38:04,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:04,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 359 treesize of output 213 [2022-01-18 17:38:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:06,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984470213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:06,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:06,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2022-01-18 17:38:06,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957697615] [2022-01-18 17:38:06,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:06,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:38:06,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:06,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:38:06,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:38:06,030 INFO L87 Difference]: Start difference. First operand 2325 states and 8286 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:15,880 INFO L93 Difference]: Finished difference Result 4419 states and 14621 transitions. [2022-01-18 17:38:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 17:38:15,880 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:38:15,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:15,888 INFO L225 Difference]: With dead ends: 4419 [2022-01-18 17:38:15,888 INFO L226 Difference]: Without dead ends: 4398 [2022-01-18 17:38:15,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1071, Invalid=6238, Unknown=1, NotChecked=0, Total=7310 [2022-01-18 17:38:15,888 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 387 mSDsluCounter, 1243 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1130 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:15,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 636 Invalid, 3021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1830 Invalid, 0 Unknown, 1130 Unchecked, 1.3s Time] [2022-01-18 17:38:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2022-01-18 17:38:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 2432. [2022-01-18 17:38:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 3.5549156725627316) internal successors, (8642), 2431 states have internal predecessors, (8642), 0 states have call successors, (0), 0 states 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 17:38:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 8642 transitions. [2022-01-18 17:38:15,931 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 8642 transitions. Word has length 26 [2022-01-18 17:38:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:15,931 INFO L470 AbstractCegarLoop]: Abstraction has 2432 states and 8642 transitions. [2022-01-18 17:38:15,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:15,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 8642 transitions. [2022-01-18 17:38:15,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:38:15,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:15,935 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:15,950 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 17:38:16,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:16,137 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:38:16,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:16,138 INFO L85 PathProgramCache]: Analyzing trace with hash -859684957, now seen corresponding path program 14 times [2022-01-18 17:38:16,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:16,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281620946] [2022-01-18 17:38:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:16,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:16,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:16,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281620946] [2022-01-18 17:38:16,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281620946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:16,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903706576] [2022-01-18 17:38:16,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:38:16,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:16,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:16,948 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 17:38:16,949 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 17:38:16,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:38:16,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:16,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:16,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:18,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:18,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 100 [2022-01-18 17:38:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:18,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:20,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:38:20,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:38:20,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:20,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 277 treesize of output 235 [2022-01-18 17:38:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:23,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903706576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:23,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:23,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-01-18 17:38:23,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458865508] [2022-01-18 17:38:23,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:23,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 17:38:23,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 17:38:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:38:23,367 INFO L87 Difference]: Start difference. First operand 2432 states and 8642 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:54,863 INFO L93 Difference]: Finished difference Result 6481 states and 22193 transitions. [2022-01-18 17:38:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-18 17:38:54,863 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:38:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:54,875 INFO L225 Difference]: With dead ends: 6481 [2022-01-18 17:38:54,876 INFO L226 Difference]: Without dead ends: 6451 [2022-01-18 17:38:54,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7873 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=2818, Invalid=17488, Unknown=0, NotChecked=0, Total=20306 [2022-01-18 17:38:54,877 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 559 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 733 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:54,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 738 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1928 Invalid, 0 Unknown, 733 Unchecked, 1.7s Time] [2022-01-18 17:38:54,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2022-01-18 17:38:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 2588. [2022-01-18 17:38:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 2587 states have (on average 3.5879396984924625) internal successors, (9282), 2587 states have internal predecessors, (9282), 0 states have call successors, (0), 0 states 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 17:38:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 9282 transitions. [2022-01-18 17:38:54,943 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 9282 transitions. Word has length 26 [2022-01-18 17:38:54,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:54,943 INFO L470 AbstractCegarLoop]: Abstraction has 2588 states and 9282 transitions. [2022-01-18 17:38:54,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:54,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 9282 transitions. [2022-01-18 17:38:54,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:38:54,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:54,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:54,969 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 17:38:55,163 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,SelfDestructingSolverStorable51 [2022-01-18 17:38:55,163 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:38:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash -948313093, now seen corresponding path program 15 times [2022-01-18 17:38:55,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:55,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787702672] [2022-01-18 17:38:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:55,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:55,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:55,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787702672] [2022-01-18 17:38:55,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787702672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:55,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568174421] [2022-01-18 17:38:55,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:38:55,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:55,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:55,892 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:38:55,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 17:38:55,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:38:55,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:55,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 17:38:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:56,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:56,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:56,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 96 [2022-01-18 17:38:57,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:57,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:57,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:38:57,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:57,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 319 treesize of output 263 [2022-01-18 17:39:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:30,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568174421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:30,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:30,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 17:39:30,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280607911] [2022-01-18 17:39:30,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:30,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:39:30,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:30,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:39:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:39:30,575 INFO L87 Difference]: Start difference. First operand 2588 states and 9282 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:46,685 INFO L93 Difference]: Finished difference Result 7226 states and 22911 transitions. [2022-01-18 17:39:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 17:39:46,685 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:39:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:46,698 INFO L225 Difference]: With dead ends: 7226 [2022-01-18 17:39:46,699 INFO L226 Difference]: Without dead ends: 7196 [2022-01-18 17:39:46,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 36 SyntacticMatches, 21 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4425 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=2101, Invalid=7999, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 17:39:46,700 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 770 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:46,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 686 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2140 Invalid, 0 Unknown, 268 Unchecked, 1.9s Time] [2022-01-18 17:39:46,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7196 states. [2022-01-18 17:39:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7196 to 2668. [2022-01-18 17:39:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2667 states have (on average 3.6141732283464565) internal successors, (9639), 2667 states have internal predecessors, (9639), 0 states have call successors, (0), 0 states 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 17:39:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 9639 transitions. [2022-01-18 17:39:46,763 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 9639 transitions. Word has length 26 [2022-01-18 17:39:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:46,764 INFO L470 AbstractCegarLoop]: Abstraction has 2668 states and 9639 transitions. [2022-01-18 17:39:46,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 9639 transitions. [2022-01-18 17:39:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:39:46,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:46,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:46,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 17:39:46,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:46,968 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:39:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1335219989, now seen corresponding path program 37 times [2022-01-18 17:39:46,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:46,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597495859] [2022-01-18 17:39:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:46,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:47,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:47,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597495859] [2022-01-18 17:39:47,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597495859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:47,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596311781] [2022-01-18 17:39:47,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:39:47,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:47,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:47,561 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:39:47,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 17:39:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:47,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:47,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:48,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:39:48,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:39:48,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:39:48,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:39:48,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 106 [2022-01-18 17:39:49,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:49,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:50,019 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:39:50,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 359 treesize of output 249 [2022-01-18 17:39:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:57,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596311781] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:57,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:57,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-01-18 17:39:57,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196276639] [2022-01-18 17:39:57,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:57,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:39:57,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:39:57,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:39:57,731 INFO L87 Difference]: Start difference. First operand 2668 states and 9639 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:17,279 INFO L93 Difference]: Finished difference Result 5826 states and 19475 transitions. [2022-01-18 17:40:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-18 17:40:17,280 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:40:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:17,289 INFO L225 Difference]: With dead ends: 5826 [2022-01-18 17:40:17,289 INFO L226 Difference]: Without dead ends: 5764 [2022-01-18 17:40:17,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=2294, Invalid=13456, Unknown=0, NotChecked=0, Total=15750 [2022-01-18 17:40:17,291 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 466 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 2537 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:17,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 607 Invalid, 2794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2537 Invalid, 0 Unknown, 145 Unchecked, 2.1s Time] [2022-01-18 17:40:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5764 states. [2022-01-18 17:40:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5764 to 2775. [2022-01-18 17:40:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 3.627974044700793) internal successors, (10064), 2774 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states 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 17:40:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 10064 transitions. [2022-01-18 17:40:17,356 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 10064 transitions. Word has length 26 [2022-01-18 17:40:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:17,356 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 10064 transitions. [2022-01-18 17:40:17,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 10064 transitions. [2022-01-18 17:40:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:40:17,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:17,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:17,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 17:40:17,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-18 17:40:17,561 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:40:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash -673180245, now seen corresponding path program 38 times [2022-01-18 17:40:17,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:17,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678845393] [2022-01-18 17:40:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:17,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:18,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:18,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678845393] [2022-01-18 17:40:18,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678845393] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:18,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40432729] [2022-01-18 17:40:18,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:40:18,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:18,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:18,083 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:40:18,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 17:40:18,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:40:18,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 17:40:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:18,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:40:18,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:40:18,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:18,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 118 [2022-01-18 17:40:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:19,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:20,344 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 17:40:20,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 359 treesize of output 249 [2022-01-18 17:40:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:24,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40432729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:24,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:24,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 27 [2022-01-18 17:40:24,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639315884] [2022-01-18 17:40:24,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:24,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:40:24,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:24,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:40:24,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:40:24,435 INFO L87 Difference]: Start difference. First operand 2775 states and 10064 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:44,881 WARN L228 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 188 DAG size of output: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:40:54,150 WARN L228 SmtUtils]: Spent 7.99s on a formula simplification. DAG size of input: 208 DAG size of output: 177 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:41:06,245 WARN L228 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 220 DAG size of output: 180 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:41:14,636 WARN L228 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 193 DAG size of output: 161 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:41:23,274 WARN L228 SmtUtils]: Spent 7.56s on a formula simplification. DAG size of input: 190 DAG size of output: 159 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:41:30,954 WARN L228 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 211 DAG size of output: 180 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:41:40,025 WARN L228 SmtUtils]: Spent 5.08s on a formula simplification. DAG size of input: 172 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:41:46,966 WARN L228 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 191 DAG size of output: 156 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:41:56,500 WARN L228 SmtUtils]: Spent 8.62s on a formula simplification. DAG size of input: 170 DAG size of output: 140 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-18 17:42:07,529 WARN L228 SmtUtils]: Spent 9.34s on a formula simplification. DAG size of input: 205 DAG size of output: 175 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2022-01-18 17:42:13,210 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:42:13,228 WARN L244 SmtUtils]: Removed 12 from assertion stack [2022-01-18 17:42:13,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-18 17:42:13,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 10307 ImplicationChecksByTransitivity, 103.9s TimeCoverageRelationStatistics Valid=3668, Invalid=20512, Unknown=0, NotChecked=0, Total=24180 [2022-01-18 17:42:13,230 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 641 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:13,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 362 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1868 Invalid, 0 Unknown, 167 Unchecked, 1.6s Time] [2022-01-18 17:42:13,232 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 17:42:13,242 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 17:42:13,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 17:42:13,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 17:42:13,439 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (2775states) and FLOYD_HOARE automaton (currently 135 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 153 for 4124ms.. [2022-01-18 17:42:13,441 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 17:42:13,441 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 17:42:13,441 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 17:42:13,445 INFO L732 BasicCegarLoop]: Path program histogram: [38, 15, 1, 1] [2022-01-18 17:42:13,446 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 17:42:13,446 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 17:42:13,448 INFO L202 PluginConnector]: Adding new model mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:42:13 BasicIcfg [2022-01-18 17:42:13,448 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 17:42:13,448 INFO L158 Benchmark]: Toolchain (without parser) took 758632.38ms. Allocated memory was 364.9MB in the beginning and 534.8MB in the end (delta: 169.9MB). Free memory was 321.8MB in the beginning and 149.9MB in the end (delta: 171.8MB). Peak memory consumption was 343.7MB. Max. memory is 16.0GB. [2022-01-18 17:42:13,448 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.16ms. Allocated memory is still 364.9MB. Free memory was 323.0MB in the beginning and 322.9MB in the end (delta: 154.0kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:42:13,448 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.71ms. Allocated memory is still 364.9MB. Free memory was 321.8MB in the beginning and 320.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 17:42:13,449 INFO L158 Benchmark]: Boogie Preprocessor took 16.96ms. Allocated memory is still 364.9MB. Free memory was 320.1MB in the beginning and 319.1MB in the end (delta: 982.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 17:42:13,449 INFO L158 Benchmark]: RCFGBuilder took 194.25ms. Allocated memory is still 364.9MB. Free memory was 319.1MB in the beginning and 309.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 17:42:13,449 INFO L158 Benchmark]: TraceAbstraction took 758381.67ms. Allocated memory was 364.9MB in the beginning and 534.8MB in the end (delta: 169.9MB). Free memory was 309.1MB in the beginning and 149.9MB in the end (delta: 159.2MB). Peak memory consumption was 331.2MB. Max. memory is 16.0GB. [2022-01-18 17:42:13,449 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 0.16ms. Allocated memory is still 364.9MB. Free memory was 323.0MB in the beginning and 322.9MB in the end (delta: 154.0kB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.71ms. Allocated memory is still 364.9MB. Free memory was 321.8MB in the beginning and 320.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.96ms. Allocated memory is still 364.9MB. Free memory was 320.1MB in the beginning and 319.1MB in the end (delta: 982.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 194.25ms. Allocated memory is still 364.9MB. Free memory was 319.1MB in the beginning and 309.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 758381.67ms. Allocated memory was 364.9MB in the beginning and 534.8MB in the end (delta: 169.9MB). Free memory was 309.1MB in the beginning and 149.9MB in the end (delta: 159.2MB). Peak memory consumption was 331.2MB. 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: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (2775states) and FLOYD_HOARE automaton (currently 135 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 153 for 4124ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2775states) and FLOYD_HOARE automaton (currently 135 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 153 for 4124ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2775states) and FLOYD_HOARE automaton (currently 135 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 153 for 4124ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (2775states) and FLOYD_HOARE automaton (currently 135 states, 28 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 153 for 4124ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 758.3s, OverallIterations: 55, TraceHistogramMax: 2, PathProgramHistogramMax: 38, EmptinessCheckTime: 0.1s, AutomataDifference: 329.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17959 SdHoareTripleChecker+Valid, 33.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17959 mSDsluCounter, 14085 SdHoareTripleChecker+Invalid, 28.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5735 IncrementalHoareTripleChecker+Unchecked, 24629 mSDsCounter, 3580 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46943 IncrementalHoareTripleChecker+Invalid, 56258 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3580 mSolverCounterUnsat, 1319 mSDtfsCounter, 46943 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5065 GetRequests, 1982 SyntacticMatches, 138 SemanticMatches, 2944 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 77715 ImplicationChecksByTransitivity, 315.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2775occurred in iteration=54, InterpolantAutomatonStates: 2399, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 54 MinimizatonAttempts, 92917 StatesRemovedByMinimization, 53 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 413.5s InterpolantComputationTime, 2618 NumberOfCodeBlocks, 2618 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3747 ConstructedInterpolants, 67 QuantifiedInterpolants, 119189 SizeOfPredicates, 576 NumberOfNonLiveVariables, 3610 ConjunctsInSsa, 880 ConjunctsInUnsatCore, 161 InterpolantComputations, 2 PerfectInterpolantSequences, 173/787 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